Abstract
In May 2017, the Egyptian armed forces conducted airstrikes against non-State targets in the neighbouring State of Libya in response to a series of attacks perpetrated against groups of Coptic Christians on Egyptian territory, killings later claimed by the self-styled Islamic State. In justifying its use of armed force, resort to which is generally impermissible in international law, Egypt purports to rely upon two exceptions to this general rule, namely: (i) authorisation on the part of the United Nations Security Council; and (ii) self-defence, while also invoking the doctrine of military assistance on request (or intervention by invitation). This article tests the legality of Egypt’s airstrikes—which have yet to be subjected to scholarly attention—in light of the three foregoing justifications. In so doing, the article evaluates the implications of this use of force for the jus ad bellum, particularly the law regulating resort to force by way of response to an armed attack for which not another State, but a non-State actor, is responsible.
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1 Introduction
On 26 May 2017, a group of armed men attacked a convoy of vehicles carrying Coptic Christians in Egypt’s Minya Governorate, killing at least 28 passengers and wounding many more.Footnote 1 The self-styled Islamic State (IS)Footnote 2 claimed responsibility for the attack the following day.Footnote 3 Before the group was able to ‘take credit’ for the ambush, however, the Egyptian armed forces had already retaliated, launching a series of airstrikes against alleged militant training camps located on the territory of neighbouring Libya.Footnote 4 In reporting its use of armed force to the United Nations Security Council (UNSC), as demanded by Article 51 of the UN Charter when States take measures in self-defence,Footnote 5 Egypt appears to rely upon two exceptions to the general rule of public international law that the threat or use of armed force is impermissible,Footnote 6 namely (i) UNSC authorisation of the resort of force and (ii) self-defence, before turning to evaluate another legal basis on which Egypt seeks to rely to justify the airstrikes, i.e., military assistance on request.Footnote 7 This article examines the legality of the justifications put forward by Egypt in support of its use of force on Libyan territory in response to what Egyptian officials considered to be an armed attack conducted by a non-State actor without any involvement on the part of the State of Libya.
The following paragraphs are divided into three sections.Footnote 8 Section 2.1 briefly examines the events that led to the May 2017 airstrikes, from Muammar Gaddafi’s removal from power in October 2011 following international intervention to the years-long battle for control over Libya between two competing regimes, each enjoying recognition at some stage, among other groups. Section 2.1 also demonstrates that it was in this context that militants were able to use parts of Libyan territory as bases from which to launch multiple, predominantly cross-border attacks against Coptic Christians. Additionally, Sect. 2.2 surveys the reaction of third States—with a focus on those most immediately impacted by the use of force under examination—and international organisations to both the terrorist attack and to Egypt’s airstrikes.
The focus of Sect. 3 rests not on the context of the airstrikes but on their legality. Section 3.1 explores the legality of Egypt’s use of force pursuant to UNSC Resolution 2292, which ‘[u]rges Member States to combat by all means … threats to international peace and security caused by terrorist acts’,Footnote 9 among other measures the UNSC adopted under Chapter VII of the UN Charter to respond to the threat posed by militants in Libya. Section 3.2 turns to assess Egypt’s claim that it acted in self-defence. In particular, this section questions whether the dictum of the majority of the International Court of Justice (ICJ) in its Advisory Opinion on the Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory (Wall Advisory Opinion) that this right can only be exercised ‘in the case of armed attack by one State against another State’Footnote 10 can be said to constitute an accurate reading of Article 51 the UN Charter. Taking the 2017 airstrikes as a case study, the article proposes that this use of force is another example of State practice and opinio juris in support of a ‘wider’ right to self-defence. Put otherwise, this article contends that Egypt’s use of force against militants in Libya lends additional weight to the belief expressed by Judge Simma in his Separate Opinion in Armed Activities on the Territory of the Congo (Armed Activities’) that ‘large-scale attacks by non-State actors can qualify as “armed attacks” within the meaning of Article 51’,Footnote 11 an opinion shared by some of his judicial colleaguesFootnote 12 and members of the academic community.Footnote 13 Section 3.3 analyses the lawfulness of Egypt’s use of force ‘in coordination with the national army of Libya’, focusing especially on the question of how the doctrine of military assistance on request operates when competing regimes claim control over the requesting State’s territory and institutions.
Section 4 concludes the article, submitting that, although some of the legal justifications for using force (ostensibly) proffered by Egypt have more merit than others, none renders its May 2017 use of force against non-State targets in Libya permissible under the jus ad bellum schema.
2 The Context of the 2017 Airstrikes
The 26 May 2017 ambush in Minya was not the first orchestrated by militants against Coptic Christians in Egypt. Nor was this the first such attack to which Egypt responded with armed force. Indeed, the incident that forms the subject of the present article is part of a series of (primarily cross-border) attacks launched by terrorist groups from bases located in eastern Libya. This section briefly examines the events that allowed such militant-friendly conditions to take hold in Libya before considering the attacks that preceded and followed the May 2017 incident as well as Egypt’s respective responses thereto. The section then turns to the reaction of third States and international organisations to the attack and the Egyptian airstrikes.
2.1 Post-Gaddafi Libya
Revolutionaries commanded by Muammar Gaddafi deposed Libya’s monarchy in a largely bloodless coup d’état on 1 September 1969,Footnote 14 heralding the beginning of what was to be a 42-year reign. It was not until 20 October 2011 that anti-Gaddafi forces succeeded, after a months-long civil war that drew the intervention of the UNSC and NATO,Footnote 15 in ousting the regime by capturing and executing its leader.Footnote 16 The Gaddafi administration was replaced with rule by the Transitional National Council (TNC) until the parliamentary elections of 7 July 2012, when the General National Congress (GNC) was established.Footnote 17 But this election was reported to have taken place amidst lawlessness, violence, and inter-tribal warfare, with cities ‘under the control of fractious militias’,Footnote 18 a continuation of the prevailing situation during the preceding nine months of TNC rule, especially in eastern Libya.Footnote 19 This ‘relentless violence’Footnote 20 also formed the backdrop to the June 2014 election of the House of Representatives (HoR), arranged by virtue of an amendment to Libya’s interim constitution,Footnote 21 to replace the GNC at the end of its term.Footnote 22 Indeed, it was even reported that voting was unable to take place in the eastern city of Derna, where IS militants had established a presence, ‘over fears that militants would try to intimidate voters’.Footnote 23 Meanwhile, in Benghazi, another city on Libya’s east coast, ‘renegade general’Footnote 24 Khalifa Haftar was waging ‘a campaign to purge the country of Islamist lawmakers and militias, sending troops and … warplanes to move against militia bases’.Footnote 25
Despite enjoying international support,Footnote 26 the HoR, which had relocated to the eastern city of Tobruk (working in hotels and even a rented car ferry) in August 2014,Footnote 27 saw its legal basis—the foregoing amendment to Libya’s 2011 Constitutional Declaration—declared void by the (Tripoli-based) Supreme Court in November of the same year.Footnote 28 The GNC ‘resume[d] its legislative activities in Tripoli’ following this decision,Footnote 29 which, as the International Crisis Group observes, gave ‘further ammunition to GNC members who rejected the HoR’.Footnote 30 At the same time, the HoR disregarded this ruling and continued to enjoy international recognition.Footnote 31 Until December 2015, control over Libya was accordingly divided between the Tobruk-based HoR—which had notably appointed General Haftar as the commander of its armed forces in March 2015Footnote 32—and the Tripoli-based GNC, as well as other Islamist and tribal factions.Footnote 33 A UN-sponsored political agreement reached in Skhirat, Morocco, with support from members of the two rival parliaments, resulted in the establishment of a national unity government, the Government of National Accord (GNA), in December 2015.Footnote 34 Significantly for the purpose of the legal evaluation that follows in Sect. 3, later that same month, the UNSC unanimously endorsed the GNA ‘as the sole legitimate government of Libya’.Footnote 35 Nevertheless, control over Libyan territory and State institutions remains divided between the GNA and the HoR, which has (generally)Footnote 36 supported and received the backing of the Haftar-led Libyan National Army (LNA)—not to be confused with forces loyal to the GNAFootnote 37—among other groups. What is more, though the UNSC explicitly endorsed the GNA as the de jure government of Libya in December 2015, several States, including Egypt, have allegedly since provided the HoR and the LNA with material and financial support,Footnote 38 while others similarly assist the GNA.Footnote 39
Jon Lee Anderson summarises the situation, in an article published in The New Yorker magazine in February 2015, as follows:
There is no overstating the chaos of post-[Gaddafi] Libya. Two competing governments claim legitimacy. Armed militias roam the streets. The electricity is frequently out of service, and most business is at a standstill; revenues from oil, the country’s greatest asset, have dwindled by more than ninety per cent. Some three thousand people have been killed by fighting in the past year, and nearly a third of the country’s population has fled across the border to Tunisia. What has followed the downfall of a tyrant—a downfall encouraged by NATO air strikes—is the tyranny of a dangerous and pervasive instability.Footnote 40
It was in the context of such ‘pervasive instability’ that militant groups were able to establish bases on Libyan territory, bases from which they conducted a wave of terrorist attacks against Coptic Christians in both Libya and Egypt, including the 26 May 2017 ambush. It is to these attacks that the present discussion now turns.
The first attack in the series was made publicly known on 15 February 2015 when IS released a video purportedly showing the beheading of 21 Egyptian Coptic Christians in the Libyan city of Sirte.Footnote 41 Acting with the explicit consent of the then-internationally recognised Libyan Government (the HoR),Footnote 42 Egypt retaliated by launching airstrikes against IS in Libya ‘in coordination with the Libyan air force’.Footnote 43 A second attack occurred on 11 December 2016 in the Egyptian capital, Cairo, when an IS-supporting suicide bomber detonated an explosive device inside St Mark’s Coptic Orthodox Cathedral, killing 25 people.Footnote 44 More IS-coordinated attacks against Coptic Christians in Egypt took place on 9 April 2017—Palm Sunday—when militants affiliated to IS bombed St George’s Church and St Mark’s Cathedral in the cities of Tanta and Alexandria, respectively, with the twin attack causing the deaths of 44 people.Footnote 45 It was subsequent to these bombings that the ambush against the convoy of vehicles took place in Minya. The May 2017 attack was, in turn, followed by further killings of Coptic Christians in Egypt for which IS claimed responsibility. These include the murder by IS gunmen of nine people at the Mar Mina Church in Helwan on 29 December 2017Footnote 46 and a second attack in the Minya Governorate on 2 November 2018.Footnote 47 Like the May 2017 attack, the latter was directed against buses carrying pilgrims to the Monastery of St Samuel the Confessor.Footnote 48 At least seven Coptic Christians were killed in the 2018 ambush, with sixteen more wounded.Footnote 49
Discussing the airstrikes that Egypt’s armed forces carried out in 2015 in response to the first attack in this series of mass killings, Karine Bannelier-Christakis observes that ‘[t]he declarations of both states made it clear that the legal basis of the airstrikes was valid consent by Libya combined with the fact that the objective was the common fight against terrorism.’Footnote 50
But this conclusion, with which the present author concurs, cannot simply be replicated with respect to the use of force under examination in the following paragraphs. Rather, the legality of the airstrikes that form the subject of this article merit a closer inspection, not least because of the establishment—and ensuing recognition—of the GNA in the period between the 2015 and 2017 uses of force. The question of whether Libya’s purported consent to Egypt’s use of armed force on its territory in May 2017 was similarly valid to its February 2015 counterpart will accordingly be addressed, together with two additional justifications that Egypt arguably puts forward when reporting its airstrikes to the UNSC, in Sect. 3. Before turning to consider this issue, however, the article will first scrutinise the reaction of third States and international organisations to the 2017 airstrikes, which, it is hoped, might shed further light on the legality of Egypt’s conduct.
2.2 International Reaction
Multiple States condemned the 26 May 2017 terrorist attack in Minya. These include, inter alia,Footnote 51 Algeria,Footnote 52 Bahrain,Footnote 53 Canada,Footnote 54 China,Footnote 55 France,Footnote 56 Germany,Footnote 57 Greece,Footnote 58 Israel,Footnote 59 Japan,Footnote 60 Jordan,Footnote 61 Pakistan,Footnote 62 Singapore,Footnote 63 Switzerland,Footnote 64 Syria,Footnote 65 Turkey,Footnote 66 the United Arab Emirates,Footnote 67 the United Kingdom,Footnote 68 and the United States of America.Footnote 69 The Organisation of Islamic Cooperation,Footnote 70 the European Union,Footnote 71 and all UNSC Member StatesFootnote 72 also denounced the attack claimed by IS, though none of the foregoing official media releases offered explicit support for Egypt’s resort to force by way of response thereto. Nor, however, did these States denounce the Egyptian airstrikes. This is the case even though several of the statements were issued after Egypt’s use of force, which, as will be examined in greater detail in Sect. 3, very swiftly followed the attack.Footnote 73 It was only the Secretary-General of the League of Arab States, Ahmed Aboul Gheit, who went on the record in a very brief interview as expressing the view that the Egyptian airstrikes were ‘very much’ justified.Footnote 74
However, what is of arguably greater import is that Libya’s internationally recognised Government—the GNA—that is to say, the representatives of the State most acutely affected by the use of force, did condemn the airstrikes.Footnote 75 The Libyan Presidential Council reportedly rejected what it viewed as a violation of Libya’s sovereignty, condemning in a statement the bombing by Egypt of sites on Libyan territory without the involvement of Libya’s legitimate authorities recognised on the Arab, African, and international planes.Footnote 76 The statement by the Presidential Council is also reported to have emphasised the desire of the GNA to coordinate future counter-terrorism operations, at home and overseas, under the auspices of international and Islamic alliances, with full respect for national sovereignty.Footnote 77 Despite this statement, the representatives of the GNA did not condemn Egypt’s airstrikes at the international level. This is despite having had opportunities to do so in ensuing meetings of the UNSC addressing the situation in Libya.Footnote 78 It could therefore be reasonably concluded that States sympathised with Egypt’s situation as a victim of terrorist atrocities without necessarily endorsing its airstrikes. Other scholars might go further and argue that such a response constitutes acquiescence. For example, multiple scholars have interpreted ‘silence’ on the part of States—particularly those most directly affected—to mean their implicit authorisation of measures involving the use of force,Footnote 79 while others take a more cautious approach.Footnote 80
The present author finds it difficult to disagree with Luca Ferro, who, after analysing recent State practice, including in Libya,Footnote 81 reaches the conclusion that third States’ silence in response to another State’s military action, not least when the use of force is accompanied by an arguably ambiguous legal justification, cannot be construed as acquiescence thereto.Footnote 82 As the following paragraphs will demonstrate, Egypt alludes to—if not explicitly invokes—three possible grounds underpinning its 2017 airstrikes in Libya, none of which are uncontroversial in their application. Erring on the side of caution, the muted reaction of third States to Egypt’s use of force—if not the attack in Minya—offers scant support for any claim that the airstrikes were lawful under the jus ad bellum.
3 The Legality of Egypt’s Use of Force
The starting point of any inquiry into whether a use of force, including in response to an armed attack perpetrated by a non-State actor operating from the territory of another State, is permissible under international law is the UN Charter. It is in Article 2(4) of the treaty that established the UN that one finds the general prohibition on the (threat or) use of force:
All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations.Footnote 83
The general rule, which the ICJ has found to constitute customary international law,Footnote 84 can therefore be said to be that the use of force is prohibited by international law. However, there are two exceptions to this general rule included in the text of the UN Charter, namely: (i) UNSC authorisation of the use of force and (ii) self-defence, while there is a third basis pursuant to which the resort to force can be said to fall beyond the scope of Article 2(4) of the UN Charter, i.e., military assistance on request.Footnote 85 As the following paragraphs demonstrate, Egypt appears to rely on all three bases to justify its May 2017 airstrikes against non-State targets in Libya.
3.1 In Accordance with Resolution 2292
The UN Charter empowers the UNSC, the UN organ charged with ‘primary responsibility for the maintenance of international peace and security’,Footnote 86 to permit the use of force in certain circumstances, set out in Chapter VII of the same treaty. Article 39 of the UN Charter states that the UNSC ‘shall determine the existence of any threat to the peace, breach of the peace, or act of aggression and shall make recommendations, or decide what measures shall be taken in accordance with Articles 41 and 42, to maintain or restore international peace and security’.Footnote 87 Article 42 of the constituent instrument of the UN adds:
Should the Security Council consider that measures provided for in Article 41 would be inadequate or have proved to be inadequate, it may take such action by air, sea, or land forces as may be necessary to maintain or restore international peace and security. Such action may include demonstrations, blockade, and other operations by air, sea, or land forces of Members of the United Nations.Footnote 88
The UNSC can accordingly authorise the use of force if the following two conditions are met: (i) the body has determined that there is a threat to the peace, breach of the peace, or act of aggression; and (ii) the organ judges that measures listed in Article 41 of the UN Charter, i.e., measures short of the use of force,Footnote 89 are insufficient to maintain or restore international peace and security.
The day after Egypt’s armed forces executed a series of airstrikes on Libyan territory, which might appear to constitute a prima facie violation of the prohibition on the use of force discussed in the preceding section, Egypt’s Ambassador and Permanent Representative to the UN, Amr Abdellatif Aboulatta, reported this resort to force in a letter to the President of the UNSC (Letter).Footnote 90 Egypt’s report could be reasonably interpreted as invoking the authorisation of the UN organ as a legal justification for its airstrikes. On the other hand, it could—equally reasonably—be argued that Egypt merely wished to underscore that its use of force was compatible with the jus ad bellum more generally insofar as it was justified by self-defence and/or by the consent of Libya. The pertinent part of the Letter reads:
These measures are being taken in accordance with the relevant Security Council resolutions, including resolution 2292 (2016) concerning the situation in Libya, which urges Member States to combat by all means, in accordance with the Charter of the United Nations and international law, threats to international peace and security caused by terrorist acts.Footnote 91
The operative paragraph of Resolution 2292 to which the Letter refers states, in relevant part, as follows:
Urges Member States to combat by all means, in accordance with their obligations under the Charter of the United Nations and other obligations under international law, including international human rights law, international refugee law and international humanitarian law, threats to international peace and security caused by terrorist acts …Footnote 92
The UNSC employs similar, albeit not identical, language in both earlier and later resolutions addressing the situation in Libya.Footnote 93 Though, at least prima facie, this paragraph might appear to support the argument that the UNSC did, in fact, authorise the Egyptian airstrikes, as Dapo Akande and Marko Milanovic claim, the phrase ‘combat by all means’ is ‘standard language in relation to counter terrorism measures not involving the use of force’.Footnote 94 Indeed, the UNSC neither explicitly ‘authorises’ the use of force by UN Member States in the text of Resolution 2292—or other related resolutions—nor ‘decides’ that they ought to take such action.Footnote 95 Thus, though the UNSC is ‘Acting under Chapter VII of the Charter of the United Nations’Footnote 96 and reaffirms ‘its determination that terrorism, in all forms and manifestations, constitutes one of the most serious threats to peace and security’Footnote 97 in the Preamble to Resolution 2292, there is no ‘decision’ authorising the use of force. The conclusion reached by Akande and Milanovic with respect to Resolution 2249—in which the UN body, inter alia, denounced a series of IS-orchestrated terrorist attacks—can therefore be reasonably applied to Resolution 2292:
This difference in language itself suggests that though the Council contemplates, and perhaps would even welcome, the use of force by states, it does not authorize such action. This lack of authorization is made clearer from the fact that the resolution calls for all necessary measures, “in compliance with international law, in particular the United Nations Charter”. This wording suggests that measures taken should comply with other rules of international law, including the jus ad bellum rules in the Charter. Thus, the resolution is to be seen as only encouraging states to do what they can already do under other rules of international law. It neither adds to, nor subtracts from, whatever existing authority states already have.Footnote 98
This conclusion also finds support in subsequent State practice. As Christine Gray observes:
Significantly, Resolution 2249 was not later relied on by states as authorizing their use of force in Syria. When the UK and Germany wrote to the Security Council after the resolution was passed, to report that they would now use force against ISIS in Syria, they did refer to Resolution 2249 as confirming that ISIS was a global and unprecedented threat to international peace and security, but they claimed to be acting in self-defence rather than under a Chapter VII authorization.Footnote 99
Turning from whether the UNSC can be viewed as having authorised the use of force to whether Egypt’s use of force was conducted in accordance with its ‘obligations under the Charter of the United Nations and other obligations under international law’,Footnote 100 the following paragraphs consider whether the airstrikes were lawful on the grounds of self-defence.
3.2 In Self-Defence
The opening paragraph of the Letter appears to suggest that Egypt sees its use of force as having been conducted in accordance with the right, enshrined in Article 51 of the UN Charter and in customary international law,Footnote 101 of States to carry out such measures in individual or collective self-defence. The Letter’s first paragraph provides as follows:
I write pursuant to Article 51 of the Charter of the United Nations in order to inform the Security Council that the Egyptian armed forces are carrying out a number of necessary and proportionate air strikes against terrorist organizations in Libya. In so doing, they are exercising their legitimate right to self-defence and acting in coordination with the national army of Libya. This action is being taken in the light of intelligence indicating that the organizations carried out a series of armed terrorist attacks within Egyptian territory, attacks that originated on Libyan territory. Most recently, on 26 May 2017, they targeted innocent Egyptian civilians in the town of Minya, in southern Egypt. That incident constitutes an attack on the sovereignty and territorial integrity of Egypt.Footnote 102
The following paragraphs will examine whether the conditions precedent to resorting to force in self-defence—and the criteria limiting the scope of such action—were met.
3.2.1 Armed Attack
Both Article 51 of the UN Charter and customary international law limit the exercise of States’ right to use force in self-defence to cases in which the concerned State has suffered an ‘armed attack’.Footnote 103 Accordingly, in order that Egypt might establish the legality of its May 2017 cross-border airstrikes, this condition must be satisfied.Footnote 104 But what qualifies as an armed attack under the jus ad bellum? The text of the UN Charter is silent on this matter.Footnote 105 Guidance can, however, be found in customary international law. This guidance, and the academic literature on this question, centres, at least in part, on two issues: (i) the threshold of force required to constitute an armed attack and (ii) the perpetrator of the armed attack. These issues will now be addressed in turn.
The jurisprudence of the ICJ implies the existence of a threshold that must be reached before it can be demonstrated that the concerned State has been the victim of an armed attack. For instance, in Military and Paramilitary Activities in and against Nicaragua (Nicaragua), the ICJ drew the express distinction between ‘the most grave forms of the use of force (those constituting an armed attack) … [and] other less grave forms’.Footnote 106 In the Court’s view, the two categories are distinguishable by their ‘scale[s] and effects’Footnote 107 and by their ‘circumstances … [and] possible motivations’,Footnote 108 the latter of which Gray reasonably describes as ‘obscure’.Footnote 109 As for specific examples, the ICJ has held that ‘mere frontier incident[s]’ would fall short of satisfying the threshold,Footnote 110 but cross-border action by a State’s armed forces,Footnote 111 ‘the sending by or on behalf of a State of armed bands, groups, irregulars or mercenaries, which carry out acts of armed force against another State of … [comparable] gravity’,Footnote 112 and even ‘the mining of a single military vessel’ could all qualify as armed attacks.Footnote 113 In addition, the Court’s case law appears to leave open the possibility that a series of attacks that fail to reach the threshold might, taken together, constitute an armed attack,Footnote 114 a view endorsed by a number of scholars based on their assessment of relevant State practice and opinio juris.Footnote 115 In light of the low bar set by the jus ad bellum framework in this context, it is therefore difficult to challenge Egypt’s assertion that the series of attacks against Coptic Christians on Egyptian territoryFootnote 116 for which IS claimed responsibilityFootnote 117 satisfied the threshold required to constitute an armed attack. But the question remains whether Egypt’s right to use force in self-defence can be triggered by an armed attack perpetrated a non-State actor. It is to this issue that the analysis now turns.
Beginning again with the case law of the ICJ, as noted in Sect. 1 of the present article,Footnote 118 the majority of the Court in the Wall Advisory Opinion opined that force used in self-defence by a victim State is only lawful in the event that it has suffered an armed attack conducted by another State,Footnote 119 a position from which it arguably did not depart in Armed Activities.Footnote 120 But the ICJ’s view is not universally shared. Indeed, Monica Hakimi identifies multiple positions vis-à-vis the use of defensive force against non-State actors at the time when States launched operations against IS in Syria, each of which has ‘some support in the practice and secondary literature[,] [though] … none was widely accepted as the correct interpretation of the law’.Footnote 121 The first such position—the most restrictive—accords with that expressed by the majority of the ICJ in the Wall Advisory Opinion and Armed Activities, that is to say that an armed attack must either be attributable to another State or that another State must have been substantially involved therein, to trigger the attacked State’s right to respond with force in self-defence.Footnote 122 The May 2017 Egyptian airstrikes do not appear to comply with this restrictive interpretation of the jus ad bellum, nor does Egypt attempt to justify its use of force in these terms. On the contrary, the Letter provides as follows:
The Government of the Arab Republic of Egypt stresses that the defensive strikes are directed solely at the members and positions of terrorist organizations, and not at the State of Libya. It is important to bear in mind the prevalent security situation in Libya: in certain areas of the country, conditions have deteriorated and the State has lost control. Terrorist organizations have thus gained an opportunity to attack Egypt from those areas.Footnote 123
Egypt therefore seems to express views similar to those States and international lawyers who espouse the second—less restrictive—position that Hakimi articulates,Footnote 124 namely those of the opinion that ‘defensive force against non-State actors is at least sometimes lawful’.Footnote 125
Albeit at a stretch,Footnote 126 this paragraph of Egypt’s report could be read as indicating tacit support from Egypt for the ‘unwilling or unable’ standard,Footnote 127 whereby the victim State of an armed attack by a non-State actor can resort to the permissible use of force in self-defence if the State on whose territory the group operates cannot—or will not—take effective action to suppress such violence.Footnote 128 This doctrine finds limited support in State practice, most notably after the 11 September 2001 attacks against the United States of America.Footnote 129 It was following these attacks that what Michael Schmitt terms a ‘normative reassessment’ of the jus ad bellum schema took place in the international community,Footnote 130 a reassessment that recognised the right to use defensive force also in response to armed attacks perpetrated by non-State actors.Footnote 131 As far as concrete examples of ‘explicit’Footnote 132 State support for the unwilling or unable standard are concerned, Russia’s 2002 resort to force in Georgia,Footnote 133 Israel’s 2006 use of force against non-State targets in Lebanon,Footnote 134 and Turkey’s use of force in northern Iraq in 2007 and 2008Footnote 135 are frequently cited, while Elena Chachko and Ashley Deeks identify several more ‘ambiguous’ examplesFootnote 136 as well as cases of States’ ‘implicit endorsement’ of the standard.Footnote 137 At the same time, however, there is ample State practice and opinio juris indicating ‘a certain reluctance’ on the part of the international community to embrace this doctrine.Footnote 138
Not least in view of this ambiguity, the better view is that Egypt relies on the fact that Libya has ‘lost control’Footnote 139 to justify its resort to the use of force. In other words, Libya ‘lacks governance authority’ in the areas of its territory from which militants launched operations—including the 26 May 2017 attack—targeting Coptic Christians in Egypt.Footnote 140 The position that armed attacks carried out by non-State actors operating in ungoverned areas of neighbouring States’ territory—that is, without any involvement on the part of the ‘host’ State—can trigger the victim State’s right to use defensive force in response enjoys State support. For example, Hakimi lists interventions by Israel in Lebanon, by the United States of America in Pakistan, by Ethiopia in Somalia, and by France in Mali as instances of interventions that drew at least some approval from States,Footnote 141 while Judges Kooijmans and Simma also endorsed the position in similar terms in their respective separate opinions in Armed Activities.Footnote 142
Can it thus be stated at this stage that Egypt was the victim of an armed attack, thereby triggering its right to use force in self-defence? In the opinion of the present author, the series of attacks against Coptic Christians on Egyptian territory for which IS militants subsequently claimed responsibility fulfils the requisite criteria not only in terms of the threshold, but also with respect to the author of the attack. In other words, it is argued that Egypt’s 2017 use of force against non-State targets in eastern Libya constitutes another ‘hole’—that is, in the form of State practice—in the reasoning of the majority of the ICJ in the Wall Advisory Opinion.Footnote 143 In addition, Egypt’s report of its use of force to the UNSC following the airstrikesFootnote 144 could be said to constitute opinio juris supporting a wider understanding of the right to self-defence.Footnote 145 For the avoidance of doubt, the argument put forward here is that the ‘hole in the Wall’ exists (and is not simply ‘emerging’), such that Egypt is able to ‘walk through it’ in a legal sense.Footnote 146 Although the attacks in question cannot be attributed to Libya, a position that Egypt does not espouse, the jus ad bellum has evolved to permit the use of defensive force against non-State actors in the circumstances discussed in the preceding paragraphs. But this interim conclusion does not necessarily mean that Egypt’s use of force in self-defence was permissible under the jus ad bellum. All such uses of force must comply with two further criteria: (i) necessity and (ii) proportionality. The following section will examine the compliance of the 2017 Egyptian airstrikes against non-State targets on Libyan territory with these two requirements.
3.2.2 Necessity and Proportionality
As with the definition of armed attack, though the text of Article 51 of the UN Charter is silent as to any limits on using force in self-defence,Footnote 147 constraints are found in customary international law.Footnote 148 The then Secretary of State of the United States of America, Daniel Webster, clearly articulated two such constraints in the aftermath of the 1837 Caroline affair, a case involving the use of force by British troops against a vessel—the Caroline—on the territory of the United States of America.Footnote 149 Webster wrote following this incident that the Government of the United Kingdom had to demonstrate ‘a necessity of self-defence, instant, overwhelming, leaving no choice of means, and no moment for deliberation’ in order for its use of force against the vessel to have been permissible.Footnote 150 Webster continued: ‘It will be for [the British Government] to show, also, that the local authorities … did nothing unreasonable or excessive; since the act, justified by that necessity of self-defence, must be limited by that necessity and kept clearly within it.’Footnote 151 Despite some debate in the literature as to whether the Caroline affair ought to be regarded as a case of self-defence,Footnote 152 the constraints on the exercise of the use of force, that is to say necessity and proportionality,Footnote 153 are widely held to be integral to the jus ad bellum.Footnote 154 This is the case particularly following the adoption of the UN Charter.Footnote 155 Accordingly, in order that Egypt’s 2017 use of force against non-State targets in Libya might be viewed as permissible, these two criteria must be satisfied.
Echoing Webster’s nineteenth century formulations following the Caroline incident, uses of force can be said to comply with the necessity requirement if there is ‘a temporal link between an armed attack and a defensive response’,Footnote 156 a viewpoint that finds support not only in State practice,Footnote 157 but also in the jurisprudence of the ICJ. In Nicaragua, the Court found a lapse in time of ‘several months’ between the armed attack in question and the purportedly defensive response by the United States of America to be relevant in holding that the necessity criterion was not fulfilled.Footnote 158 A second aspect of the necessity requirement is that, before resorting to force, States must first pursue peaceful means; in other words, the use of force must be a ‘last resort’.Footnote 159 A third component falls at the—albeit blurry—boundary between the necessity and proportionality criteria, namely that ‘the action undertaken … should in principle be directed against the source(s) of the armed attack(s).’Footnote 160 The target(s) of the use of defensive force are consequently also relevant to any assessment of the legality of such operations.Footnote 161
What, then, does the proportionality criterion entail? Although necessarily dependent on the circumstances of the case at hand,Footnote 162 it is generally acceptedFootnote 163 that the use of force in self-defence need not be equivalent to that employed in the armed attack as far as ‘the forms, substance and strength of the action’ are concerned.Footnote 164 Put otherwise, it is the objective of the defensive measures against which the proportionality of such action ought to be weighed. As for what might constitute lawful aims of using force in self-defence, following an analysis of relevant State practice, Tom Ruys reaches the conclusion that the evaluation ought to include both retrospective and prospective elements.Footnote 165 The aims of halting or repelling an attack and deterring or preventing future attacks might thus be seen as legitimate, depending on the facts at issue. As for the factors relevant to determining whether the use of force in self-defence is proportionate, Judith Gardam identifies several such indicators, each of which finds its basis in State practice, namely ‘the geographical and destructive scope of the response, the duration of the response, the selection of means and methods of warfare and targets and the effect on third States.’Footnote 166 Before testing the permissibility of Egypt’s use of force against these criteria, however, it should be emphasised that States are afforded a degree of flexibility or—as Yoram Dinstein puts it with respect to proportionality, ‘elasticity’—when determining whether their uses of force in self-defence adhere to the necessity and proportionality requirements.Footnote 167 This fact will be taken into consideration in the following paragraphs.
Turning to the legality of Egypt’s conduct in light of these two parameters, the Letter explicitly asserts that the ‘Egyptian armed forces are carrying out a number of necessary and proportionate air strikes against terrorist organizations in Libya’.Footnote 168 adding that ‘the defensive strikes are directed solely at the members and positions of terrorist organizations’.Footnote 169 Notably in view of the concern expressed in the literature that reports submitted pursuant to Article 51 of the UN Charter can be used as mere ‘propaganda’,Footnote 170 much of the Egyptian account of events finds corroboration in sources conceivably less susceptible to partiality on the part of the reporting State.Footnote 171 At the same time, however, doubt has been expressed as to whether the purported perpetrator of the Minya attack, namely the IS militant group, was the target of Egypt’s use of force in Libya, an issue to which the analysis will return.
Commencing with the temporal link between the armed attack by the non-State group and Egypt’s airstrikes in response, in the view of the present author, this element of necessity is arguably satisfied on the facts. That the Egyptian armed forces responded to the ambush in Minya only ‘hours’ after its occurrenceFootnote 172 does not necessarily imply that the use of defensive force was ‘premeditated’ or ‘retaliatory’ in character.Footnote 173 As Ruys observes, ‘There is no clear-cut distinction between “premeditated” reprisals and “spontaneous” self-defence’.Footnote 174 Yet, to reach the opposite conclusion would not be unreasonable. As Iran contended in its memorial submitted to the ICJ in Oil Platforms:
Whilst States are entitled to prepare for necessary measures in self-defence … it is clear that where responsive measures are pre-meditated and pre-planned, then—at least where carried out as planned—they cannot be truly protective. This is for the reason that they will rarely be limited to the necessities of the case, for the “case”, the actual location, size and nature of the attack is not known.Footnote 175
It is almost certainly for this reason—namely that there is no unequivocal position discernible from State practice on how immediate defensive responses ought to be viewed—that scholars have argued against a strict application of this aspect of necessity.Footnote 176
Turning to the question of whether the use of armed force by Egypt was a ‘last resort’, an element of the necessity criterion that arguably carries less legal weight than its immediacy counterpart,Footnote 177 the answer is more straightforward. It could be plausibly argued that peaceful, diplomatic means would have been futile in the instant case in view of Libya’s lack of control over the territory from which terrorists launched a series of attacks against Coptic Christians in Egypt.Footnote 178 As the President of Egypt, Abdel Fattah El Sisi, remarked in an address delivered in the immediate aftermath of the May 2017 ambush in Minya:
During the past two years, a thousand four-by-four vehicles that wanted to enter Egypt across the border with Libya were destroyed. During the last three months alone, three hundred four-by-four vehicles that were on their way to Egypt from Libya were destroyed.Footnote 179
This revelation serves to underline the lack of governance authority across swathes of Libyan territory and, in turn, the argument that pacific alternatives would have proved fruitless at the time of the Egyptian use of force.
With respect to the target(s) of the airstrikes, however, the waters become far murkier. For example, the Letter reports that Egypt’s airstrikes were directed at ‘terrorist organizations in Libya’, without mentioning IS by name.Footnote 180 In a similar vein, video footage released via the YouTube account of the Egyptian Ministry of Defence on the day of the airstrikes—showing, inter alia, Egyptian military aircraft taking flight—categorises the target of the operations as ‘terrorist groups in Libya’.Footnote 181 At the same time, it is reported that IS militants have not had a presence in one of the targeted cities, Derna, since their expulsion in 2015Footnote 182 and that Egypt’s use of force was a pretext for attacking Islamist groups other than those affiliated with IS in support of General Khalifa Haftar and the LNA, with whom Egypt is reportedly allied.Footnote 183 The latter scenario, if accurately depicted, arguably bears similarity to the use of force at issue in Oil Platforms inasmuch as the non-IS-affiliated militant groups might be regarded as a ‘target of opportunity’ as opposed to an ‘appropriate military target’.Footnote 184 Such a conclusion might, as transpired in the foregoing case before the ICJ, undermine the claim that Egypt’s use of force complied with the necessity requirement. Notwithstanding this doubt—which might equally apply to IS’ claim of responsibility for the armed attack to which Egypt responded with force—and considering the flexibility granted to States when assessing the legality of their uses of defensive force in light of the necessity and proportionality principles, the ensuing paragraphs will examine Egypt’s compliance with the remaining facets of these criteria.
Because the Egyptian use of force took place after—as opposed to before or during—the armed attack, it can be reasonably assumed that the objective of the defensive action was to deter or prevent future attacks. Such a conclusion finds support in the foregoing speech by President El Sisi, whose address contained the following remarks:
Any camps that train terrorists to target us in Egypt, will be hit, whether inside or outside Egypt. I hope my message is clear to everyone. We will not hesitate to protect our people from this evil and its people.Footnote 185
Having established the aim of Egypt’s action, against which the proportionality of its use of force should be assessed, the case law of the ICJ offers valuable guidance on some of the factors relevant to making such a determination. In Armed Activities, the Court expressed the following obiter opinion with regard to Uganda’s use of force in the Democratic Republic of the Congo: ‘The Court cannot fail to observe … that the taking of airports and towns many hundreds of kilometres from Uganda’s border would not seem proportionate to the series of transborder attacks it claimed had given rise to the right of self-defence’.Footnote 186 The ICJ was also of the opinion that the disproportionate response by Uganda on this occasion undermined the compliance of its use of force with the necessity requirement.Footnote 187 In contrast, Egypt’s response to the IS-orchestrated armed attack was reportedly limited, not only geographically, but also temporally. In geographical terms, the airstrikes were directed at militants in the Libyan city of Derna,Footnote 188 while it was reported that targets in the city of Hun in the Jufra District were also hit.Footnote 189 Taking into account the elasticity granted to States when evaluating whether their uses of defensive force fall within the customary international law constraints on such action, it is difficult to label Egypt’s 2017 airstrikes against non-State actors in Libya as disproportionate. This said, questions remain with respect to the targets of the airstrikes and much depends on whether the use of force was directed towards IS militants or other Islamist groups operating from areas of Libyan territory over which the GNA did not exercise control.
It has therefore been demonstrated that Egypt’s May 2017 airstrikes arguably satisfied the conditions precedent to the use of force in self-defence. Egypt was the victim of an armed attack—or, it could be contended, a series thereof—perpetrated by a non-State actor operating from an area of Libya over which no authority had control. As for the constraints placed upon the exercise of such force by the principles of necessity and proportionality, an argument can be made that Egypt’s airstrikes satisfied this aspect of the jus ad bellum, though to adopt such a position would require a generous interpretation of the abovementioned flexibility afforded to States in applying these two criteria, especially the former. Even though reasonable minds might well argue otherwise, in the view of the present author, Egypt’s airstrikes fail to satisfy the customary requirements of necessity and proportionality in relation to self-defence. What remains to be determined, however, is whether Egypt’s use of force was rendered permissible by virtue of Libya’s consent. It is to this important issue that the present article now turns.
3.3 ‘In Coordination with the National Army of Libya’
Egypt appears to invoke Libya’s consent to justify its May 2017 airstrikes. Indeed, in its report to the UNSC, Egypt’s Ambassador and Permanent Representative to the UN advises that the Egyptian armed forces are ‘acting in coordination with the national army of Libya’ in their operations.Footnote 190Prima facie, this might not raise questions as to the legality of the use of force. As put by Louise Arimatsu and Michael Schmitt, ‘To the extent that a State approves foreign operations on its territory, it obviously cannot claim that they amount to either a breach of its sovereignty or the unlawful use of force against it.’Footnote 191 However, this area of law is not uncontroversial. As Erika de Wet identifies, controversies exist with respect to, inter alia, the authority permitted to issue such invitations or requests and the relationship between consent and the use of force in self-defence in accordance with Article 51 of the UN Charter.Footnote 192 Both of these issues are implicated in the present case.
Effective control and international recognition are habitually assessed when deciding whether an authority ostensibly representing a State is permitted to request military assistance from another State.Footnote 193 Beginning with the former, the regime purporting to be the recognised, de jure government, at a minimum, ‘must exercise control of the state machinery; that is, the capital and the state institutions.’Footnote 194 At the time of the Egyptian airstrikes, control over Libyan territory, capital, and institutions was divided between the internationally recognised GNA—which exercised nominal control, at most, over the Libyan Army—the HoR, and LNA forces led by General Khalifa Haftar,Footnote 195 as well as other (often-warring) Islamist and tribal factions. Each of these authorities had control over elements of the State machinery, though none could claim effective control, even if construed at its narrowest, in Libya in May 2017.
As for democratic legitimacy, it cannot (yet) be said that this doctrine has supplanted its effective control counterpart as the primary determinant of the authority entitled to extend requests for military assistance on the part of a State.Footnote 196 Moreover, as de Wet observes:
the proliferation of internationally recognized interim governments that came about through negotiated settlements suggests that in conflict situations both effective control and democratic legitimacy of origin at times remain aspirational criteria for governmental recognition. In these situations the recognition of the interim authority as the de jure government is based on the hope that a government in which all major parties to the conflict is represented may ultimately yield the stability required for effective control and the holding of free and fair elections.Footnote 197
The GNA falls into this category. Therefore, though the then-internationally recognised HoR appointed General Haftar to lead Libya’s armed forces in March 2015,Footnote 198 after the recognition of the GNA in December 2015, the HoR can no longer be said to represent Libya.
It is therefore pertinent to ask the question: with which ‘national army of Libya’ was Egypt ‘coordinating’ in its airstrikes? The original Arabic-language version of Egypt’s Letter is identical to its English translation and consequently offers little by way of insight into this issue.Footnote 199 However, contemporaneous reports indicate that it was General Haftar’s LNA forces—not the Libyan Army—with whom Egypt was ‘coordinating’.Footnote 200 Indeed, the commander of the LNA’s Air Force, Saqr Al-Jaroushi, confirmed as much in a 26 May 2017 interview with Egyptian newspaper, El Watan.Footnote 201 In the words of this source, ‘The [Egyptian] planes carried out their operations and returned after targeting six terrorist sites, causing a number of deaths and casualties in the ranks of the Shura Council of Mujahideen in Derna.’Footnote 202
Egypt’s explicit support for the LNA at the international level adds additional weight to this conclusion. For example, addressing a meeting of the UNSC convened to consider the Report of the Secretary-General on the UN Support Mission in Libya on 19 April 2017, the month preceding the IS-led attack in Minya Governorate, Egypt’s Ambassador and Permanent Representative to the UN expressed the following view:
It goes without saying that in order to eliminate the terrorism of the Islamic State in Iraq and the Levant and other groups posing a threat to Libya, a genuine national effort must be carried out, and we believe that the Libyan National Army is in the best position to fulfil such a role. Therefore, the international community must recognize that in order to eliminate the dangers of terrorism and organized crime originating from Libya, the highest degree of support must be provided to the Army as soon as possible.Footnote 203
Such an interpretation would also be consistent with a speech delivered by Egyptian President El Sisi in June 2020:
Any direct intervention by Egypt in Libya now has international legitimacy, either within the framework of the UN Charter (Right to self-defense), or according to the only Libyan elected legitimate authority (Parliament).Footnote 204
The present author shares the opinion expressed by Ferro with respect to this speech, namely that Egypt appears to ‘rely on an invitation from [its] favoured governing body in Libya’,Footnote 205 a position according with that expressed in the Letter.Footnote 206 As Bannelier-Christakis claimed with respect to Egypt’s February 2015 use of force, ‘Despite the existence of the civil war in Libya, Egypt considered that the airstrikes were perfectly legal because the invitation emanated from the internationally recognized Libyan government’.Footnote 207 Such a conclusion might have (rightly) held water when the HoR enjoyed international recognition, but it is difficult to reconcile this point of view with the position expressed—unanimously—by the members of the UNSC in December 2015 that the GNA is ‘the sole legitimate government of Libya’.Footnote 208 In other words, timing matters. As Gray observes, already in 2016, three regional organisations—the African Union, the League of Arab States, and the European Union—joined the UNSC in recognising the GNA as the ‘sole legitimate government of Libya’, and, significantly for the purposes of the present analysis, ‘stressed that the GNA was the sole legitimate recipient of international security assistance’.Footnote 209 De Wet reaches a similar conclusion:
As far as the … Libyan Government of National Accord is concerned, its continued recognition has been assured through its endorsement in UNSC Resolution 2259 of 23 December 2015 which determined the Government of National Accord to be the sole legitimate government of Libya. Even though this resolution was not adopted under Chapter VII of the UN Carter [sic], it carries significant political weight as it was unanimously adopted. As a result, it is unlikely that any new government will be recognized (prematurely) by states, unless or until the UNSC has withdrawn support for the current Government of National Accord.Footnote 210
Libya’s consent is accordingly not as evidently discernible in the instant case as it might have been with respect to earlier uses of force authorised by the HoR.Footnote 211
4 Conclusion
Depending on how one interprets Egypt’s report of its use of force to the UNSC under Article 51 of the UN Charter, it could be contended that the Egyptian authorities invoke multiple legal grounds justifying the airstrikes in Libya. This article has demonstrated that, without stretching the jus ad bellum to breaking point, none of these justifications—two of which were subsequently repeated in public—render the operations permissible.
As far as UNSC authorisation of the intervention is concerned, it is uncertain whether Egypt purports to rely on Resolution 2292 as a legal basis for its defensive action. Regardless, the foregoing analysis shows that the most convincing interpretation of the UN organ’s intent in adopting the measures contained therein was to support—or encourage—those States using force to combat terrorism in Libya justified on other legal grounds, namely in self-defence or with the consent of the recognised, de jure government.
Turning to self-defence, though the present author reached the interim conclusion that Egypt suffered an armed attack—perpetrated not by, nor with the substantial involvement of, another State, but by a non-State actor—thereby triggering the right to respond with defensive force, the airstrikes arguably failed to meet the criteria constraining the exercise of such force. The discussion in Sect. 3.2.2 highlighted the uncertainty over the target(s) of the Egyptian airstrikes, which might undermine the claim that the operations were permissible. At the same time, the author acknowledges both that States are afforded some flexibility in assessing their uses of force in light of necessity and proportionality and that IS’ declaration that its militants were responsible for the killings in Minya should be regarded with a similar level of caution. Whether the use of force was permissible in self-defence therefore depends on the amount of elasticity one affords to States under the jus ad bellum. The reaction of (affected) third States and international organisations does little to clarify these muddy waters. This said, the GNA’s unequivocal condemnation of the intervention hardly bolsters the argument that the airstrikes were lawful, particularly when contrasted with the very limited public support expressed for the operations.
A similar conclusion can be reached with regard to the third and final justification, i.e., that the use of force was lawful in view of Libya’s consent thereto. The preceding paragraphs demonstrate that, even if Egypt purported to rely on the invitation or request of the HoR—as opposed to the LNA—to intervene, this body was no longer internationally recognised as the de jure government of Libya in May 2017. Nor did it enjoy effective control. While the GNA could not be said to satisfy the latter criterion either, the widespread international support for this regime—expressed by all members of the UNSC, the African Union, the League of Arab States, and the European Union—is impossible to ignore in this context.
In sum, therefore, the only possible legal basis on which Egypt might rely is the right to use force in self-defence, though, as discussed, this is shaky ground. While this article aims to underscore that the jus ad bellum permits a State to resort to defensive force when it suffers an armed attack perpetrated by a non-State actor acting alone, all such uses of force must still comply with the necessity and proportionality requirements. It would demand a broad reading of the flexibility afforded to States in applying these criteria to find that Egypt’s 26 May 2017 use of force against non-State targets in Libya was permissible under the current jus ad bellum schema. Not least in view of the muted reaction of third States and international organisations to the airstrikes, the present author cannot countenance such an interpretation.
Notes
Walsh and Youssef (2016a).
Also known as the Islamic State in Iraq and the Levant (ISIL), the Islamic State in Iraq and Syria (ISIS), or by the Arabic acronym داعش [Daesh].
Hennessy-Fiske (2017); Al Jazeera and Agencies, ‘تنظيم الدولة يتبنى هجوم المنيا والسيسي يتوعد [ISIS Claims Minya Attack and El Sisi Threatens]’, Al Jazeera (27 May 2017) https://www.aljazeera.net/news/arabic/2017/5/27/السيسي-يطمئن-الأقباط-ويتوعد-مرتكبي.
Walsh and Youssef (2016a).
Art. 51 UN Charter (Measures taken by Members in the exercise of [the] right of self-defence shall be immediately reported to the Security Council). For analysis of State practice with respect to this requirement, see Green (2015).
Art. 2(4) UN Charter.
The structure is inspired by that adopted throughout Ruys et al. (2018).
UNSC Res. 2292, UN Doc. S/RES/2292, 14 June 2016, para. 2.
Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory (Advisory Opinion) [2004] ICJ Reports 136 (Wall Advisory Opinion), p. 194.
Armed Activities on the Territory of the Congo (Democratic Republic of the Congo v. Uganda) (Judgment) [2005] ICJ Reports 168 (Armed Activities), p. 337 (separate opinion of Judge Simma).
Ibid., pp. 314–315 (separate opinion of Judge Kooijmans). For similar views, see Wall Advisory Opinion, above n. 10, p. 215 (separate opinion of Judge Higgins), p. 230 (separate opinion of Judge Kooijmans), p. 242 (Declaration of Judge Buergenthal).
See e.g. van Steenberghe (2016), p. 46, observing that ‘[t]he majority of scholars, including those who could be called “restrictivists”, now recognize the right of states to respond in self-defence to any armed attack, whatever the state or non-state origin of such attack’. However, the argument that this is now the majority view remains contested. See Corten 2016b. Inter alia, the plea states that an armed attack ‘may occur either where acts of war perpetrated by a terrorist group can be attributed to the State, or by virtue of a substantial involvement of that State in the actions of such groups.’ As of 14 September 2016, 243 professors had signed the plea. See Contre une invocation abusive de la légitime défense pour faire face au défi du terrorisme—A plea against the abusive invocation of self-defence as a response to terrorism (6 October 2016) http://cdi.ulb.ac.be/contre-invocation-abusive-de-legitime-defense-faire-face-defi-terrorisme/.
Vandewalle (2012), pp. 77–78.
Ibid., p. 204, citing UNSC Res. 1973, UN Doc. S/RES 1973, 17 March 2011, which established a ‘No Fly Zone’ in Libyan airspace. See also UNSC Res. 1970, UN Doc. S/RES/1970, 26 February 2011, which, among other measures, referred the situation in Libya to the International Criminal Court and requested UN Member States to implement targeted sanctions against Muammar Gaddafi and other individuals associated with his regime.
Ibid., p. 208.
Kirkpatrick (2012).
Ibid.
Ibid.
Fahim and Zway (2014).
For discussion, see Maghur (2014).
Ibid. The author adds: ‘However, Article 30 of the Constitutional Declaration did not clearly mandate the length of the GNC’s term in office. Consequently, the second transfer of power was turbulent and triggered war rather than peace and stability.’.
Fahim and Zway (2014).
Ibid. See also International Crisis Group (2015), fn. 24.
Ibid.
See e.g. Security Council Press Statement on Libya’s Elections, UN Doc. SC/11489, 23 July 2014.
Ryan (2014).
Eljarh (2014).
Ibid.
International Crisis Group (2016), fn. 1.
Ibid.
Al-Warfalli (2015).
See International Crisis Group (2016), fn. 1.
Fahim and Zway (2015).
UNSC Res. 2259, UN Doc. S/RES/2259, 23 December 2015, para. 3. See also UNSC Res. 2278, UN Doc. S/RES/2278, 31 March 2016, preamble para. 3.
See International Crisis Group (2015), fn. 24, reporting that ‘The support the HoR and Thinni government have given him is ambiguous: on several occasions senior government officials, while acknowledging support for Operation Dignity, denied they backed the renegade general. Others have tried to minimise their support for Haftar, which they say is subsidiary to their support for the Libyan National Army.’
See e.g. Wintour (2020).
See e.g. International Crisis Group (2020); QNA (2020). A copy of the latter is available—in Arabic—at @libyaalahrartv (Libya Al Ahrar TV) (Twitter, 26 October 2020, 12:21 pm GMT) https://twitter.com/libyaalahrartv/status/1320702103925497858, while a copy of the 2019 Memorandum of Understanding between Turkey and the GNA is available—in Arabic and English—at Bozkurt (2019).
Anderson (2015).
Kirkpatrick and Callimachi (2015).
See Bannelier-Christakis (2016), p. 756, citing UN SCOR, 70th sess, 7387th mtg, UN Doc. S/PV.7387, 18 February 2015, p. 5.
Ibid.
Walsh and Youssef (2016b)
Samaan and Walsh (2017).
Youssef (2017).
Walsh and Ezz (2018).
Ibid.
Ibid.
Bannelier-Christakis (2016), p. 756.
Egypt’s official State Information Service reports condemnation (and, in certain cases and to varying degrees, support for Egypt in its fight against terrorism) on the part of Saudi Arabia, the United Arab Emirates, Bahrain, Palestine, Jordan, Iraq, Russia, the United Kingdom, Algeria, Kuwait, the Arab Parliament, ‘the Libyan interim government’, the Organization of Islamic Cooperation, France, and Oman. ‘Arab, int’l condemnation of Minya terrorist attacks’, State Information Service (27 May 2017) https://www.sis.gov.eg/Story/113185.
‘L’Algérie condamne “avec vigueur” l’attentat terroriste ayant ciblé un bus dans la province de Minya’ (26 May 2017), http://www.mae.gov.dz/news_article/4849.aspx.
Ministry of Foreign Affairs of Kingdom of Bahrain condemns terrorist attack in Minya in Arab Republic of Egypt’ (26 May 2017), https://www.mofa.gov.bh/Default.aspx?tabid=7824&language=en-US&ItemId=7442.
Statement by the Prime Minister of Canada on the terrorist attack on Coptic Christians in Egypt’ (26 May 2017) https://pm.gc.ca/en/news/statements/2017/05/26/statement-prime-minister-canada-terrorist-attack-coptic-christians-egypt.
‘Foreign Ministry Spokesperson Lu Kang's Remarks on Terrorist Attack in Egypt’ (27 May 2017) http://eg.china-embassy.org/eng/fyrth/t1465871.htm.
Egypt—Terrorist attack in Minya province—Statement by M. Jean-Yves Le Drian, Minister for Europe and Foreign Affairs (26 May 2017)’ (26 May 2017) https://www.diplomatie.gouv.fr/en/country-files/egypt/news/article/egypt-terrorist-attack-in-minya-province-statement-by-m-jean-yves-le-drian.
‘السفير الألماني يدين الاعتداء على مواطنين مسيحيين في مصر [German Ambassador Condemns the Attack on Christian Citizens in Egypt]’ (27 May 2017) https://kairo.diplo.de/eg-ar/aktuelles/-/1988740.
Foreign Ministry announcement on the deadly terrorist attack in Egypt’ (26 May 2017) https://www.mfa.gr/en/current-affairs/statements-speeches/foreign-ministry-announcement-on-the-deadly-terrorist-attack-in-egypt.html.
Israel Strongly Condemns the Terrorist Attack in Egypt’ (26 May 2017) https://www.gov.il/en/Departments/news/spokeegypt270517.
‘Terror attacks in Minya, Egypt (Statement by Foreign Press Secretary Norio Maruyama)’ (29 May 2017) https://www.mofa.go.jp/press/release/press4e_001604.html.
‘King condemns terrorist attack on Coptic bus in Minya’ (26 May 2017) https://kingabdullah.jo/en/news/king-condemns-terrorist-attack-coptic-bus-minya.
‘Pakistan Condemns Terrorist Attack in Egypt’ (28 May 2017) < http://mofa.gov.pk/pakistan-condemns-terrorist-attack-in-egypt-2/.
‘MFA Press Statement: Condolence letters from Singapore leaders on the attack on Coptic Christians in Minya, Egypt on 26 May 2017’ (27 May 2017) https://www.mfa.gov.sg/Newsroom/Press-Statements-Transcripts-and-Photos/2017/05/MFA-Press-Statement-Condolence-letters-from-Singapore-leaders-on-the-attack-on-Coptic-Christians-in.
Attack in Egypt—FDFA position statement’ (26 May 2017) https://www.admin.ch/gov/en/start/documentation/media-releases.msg-id-66862.html.
‘سورية تدين بأشد العبارات الهجوم الإرهابي في المنيا: دليل على تفاقم ظاهرة الإرهاب [Syria Condemns in the Strongest Terms the Terrorist Attack in Minya: Evidence of the Exacerbation of the Phenomenon of Terrorism]’ (27 May 2017), http://www.mofa.gov.sy/ar/pages877/سوريةتدينبأشدالعباراتالهجومالإرهابيفيالمنيادليلعلىتفاقم.
No. 159, 26 May 2017, Press Release Regarding the Terrorist Attack in Egypt’ (26 May 2017) http://www.mfa.gov.tr/no_-159_-26-may-2017_-press-release-regarding-the-terrorist-attack-in-egypt.en.mfa.
UAE condemns terrorist attack on bus in Egypt’ (26 May 2017), https://www.mofaic.gov.ae/en/mediahub/news/years/2017/5/26/26-05-2017-uae-egypt.
‘Minister for North Africa statement on terrorist attack in Egypt’ (26 May 2017), https://www.gov.uk/government/news/minister-for-north-africa-statement-on-terrorist-attack-in-egypt.
‘Statement by President Donald J. Trump on the Attack in Egypt’ (26 May 2017), https://eg.usembassy.gov/statement-president-donald-j-trump-attack-egypt/.
‘OIC Condemns Terrorist Attack in Minya Governorate, South of Egypt’ (26 May 2017), https://www.oic-oci.org/topic/?t_id=13635&ref=5934&lan=en.
‘Statement by the Spokesperson on the attack in Egypt’ (26 May 2017), https://eeas.europa.eu/delegations/iceland/26980/attack-egypt_en.
Security Council Press Statement on Terrorist Attack in Minya, Egypt, UN Doc. SC/12845 (26 May 2017); UN SCOR, 72nd sess, 7952nd mtg, UN Doc. S/PV.7952 (26 May 2017). The Members States of the UNSC at the time of the attack and its subsequent condemnation comprised Uruguay (President), Bolivia, China, Egypt, Ethiopia, France, Italy, Japan, Kazakhstan, Russia, Senegal, Sweden, Ukraine, the United Kingdom, and the United States of America. The UN Secretary-General separately condemned the terrorist attack. See Secretary-General Condemns ‘Despicable’ Terrorist Attack in Egypt, UN Doc. SG/SM/18539, 26 May 2017.
See below n. 172 and accompanying text.
RT, ‘Egypt’s airstrikes in Libya ‘very much justified’—Arab League Secretary-General Gheit’ (YouTube, 30 May 2017) 0:00:30–0:00:31 https://www.youtube.com/watch?v=29I-rvNd3ls&list=ULFmt212wcy7E. The Secretary-General was, however, less explicit in an earlier media release. See جامعة الدول العربية—League of Arab States (Facebook, 27 May 2017), https://www.facebook.com/arab.league/posts/1294858707230421.
The full statement is available at Ean Libya, ‘“الرئاسي” يُدين “هجوم المنيا” ويرفض استباحة الأراضي الليبية [Presidential Council Condemns the “Minya Attack” and Rejects the Conquest of Libyan Territories]’, Ean Libya (27 May 2017) https://www.eanlibya.com/الرئاسي-يُدين-هجوم-المنيا-ويرفض-استب/. See also Al Jazeera and Agencies, ‘المجلس الرئاسي يستنكر الغارات المصرية على ليبيا [Presidential Council Denounces Egyptian Raids on Libya]’, Al Jazeera (27 May 2017), https://www.aljazeera.net/news/arabic/2017/5/27/المجلس-الرئاسي-يستنكر-الغارات.
Ibid.
Ibid.
The representative of Libya was invited to participate in meetings of the UNSC on 7 June 2017 and 12 June 2017. In neither of those meetings was the issue of Egypt’s use of force raised. See UN SCOR, 72nd sess, 7961st mtg, UN Doc. S/PV.7961, 7 June 2017; UN SCOR, 72nd sess, 7964th mtg, UN Doc. S/PV.7964, 12 June 2017.
Ferro (2021), examining armed interventions by Turkey in Libya and by Saudi Arabia and the United Arab Emirates in Yemen.
Ibid., p. 10. Ferro argues: ‘It … appears impossible to infer acquiescence from silence in response to controversial State action followed by an ambiguous legal justification or one that is entirely absent.’
Art. 2(4) UN Charter.
Military and Paramilitary Activities in and against Nicaragua (Nicaragua v. United States of America) (Merits) [1986] ICJ Reports 14 (Nicaragua), pp. 98–100.
See Visser (2019), convincingly arguing that intervention by invitation does not constitute a third ‘exception’ to the prohibition on the use of force.
Art. 24(1) UN Charter.
Art. 39 UN Charter.
Art. 42 UN Charter.
Art. 41 UN Charter provides as follows: ‘The Security Council may decide what measures not involving the use of armed force are to be employed to give effect to its decisions, and it may call upon the Members of the United Nations to apply such measures. These may include complete or partial interruption of economic relations and of rail, sea, air, postal, telegraphic, radio, and other means of communication, and the severance of diplomatic relations.’
Letter dated 27 May 2017 from the Permanent Representative of Egypt to the United Nations addressed to the President of the Security Council, UN Doc. S/2017/456, 1 June 2017 (Letter).
Ibid.
UNSC Res. 2292, above n. 9, para. 2.
See e.g. UNSC Res. 2161, UN Doc. S/RES/2161, 17 June 2014, preamble para. 5; UNSC Res. 2174, UN Doc. S/RES/2174, (27 August 2014, preamble para. 8; UNSC Res. 2213, UN Doc. S/RES/2213, 27 March 2015, preamble para. 5; UNSC Res. 2214, UN Doc. S/RES/2214, 27 March 2015, preamble para. 10, para. 3; UNSC Res. 2238, UN Doc. S/RES/2238, 10 September 2015, preamble para. 10.
Cf. Akande and Milanovic (2015), discussing UNSC Res. 2249, UN Doc. S/RES/2249, 20 November 2015.
UNSC Res. 2292, above n. 9, preamble para. 17.
Ibid., preamble para. 16. This language echoes Art. 39 UN Charter with respect to ‘any threat to the peace’.
Akande and Milanovic (2015).
Gray (2018), p. 386.
UNSC Res. 2292, above n. 9, para. 2.
Nicaragua, above n. 84, para. 94.
Letter, above n. 90.
Art. 51 UN Charter; Nicaragua, above n. 84, p. 103.
Oil Platforms (Islamic Republic of Iran v. United States of America) (Merits) [2003] ICJ Reports 161 (Oil Platforms), p. 189. What is more, Egypt must discharge the burden of proving the existence of an armed attack.
Nicaragua, above n. 84, p. 101.
Ibid., p. 103.
Ibid., p. 120.
Nicaragua, above n. 84, p. 103.
Ibid.
Ibid.
Oil Platforms, above n. 104, p. 195.
Ruys (2010), p. 169, citing e.g. Ago (1980), pp. 69–70; Blum (1976), p. 233; Bowett (1972), p. 9; Brownlie (1961) p. 245; Constantinou (2000), p. 64; Dinstein (2005), pp. 230–231; Feder (1987), pp. 395–432; Gazzini (2005), pp. 143–144; Higgins (1963), pp. 201–202; Stahn (2003), p. 46. Cf. International Law Association, Committee on the Use of Force, Final Report on Aggression and the Use of Force, 78 International Law Association Reports of Conferences 588 (ILA Report), p. 596 (2018), observing that ‘There is some, not entirely consistent, support for the theory, but it is unclear whether it has been widely accepted.’.
For the purposes of the present assessment, the ‘series of attacks’ to which the article refers at this juncture is limited to those that took place in Egypt. The analysis therefore excludes the attack against Coptic Christians in Sirte, Libya, in response to which Egypt conducted separate military operations. For analysis of the legality of this earlier use of force, see Bannelier-Christakis (2016), pp. 756–758.
See above n. 44–49 and accompanying text. Notably, Egypt makes explicit reference to the May 2017 attack in Minya. See Letter, above n. 90.
See above n. 10 and accompanying text.
Wall Advisory Opinion, above n. 10, p. 194.
Armed Activities, above n. 11, pp. 222–223. Having found that ‘the legal and factual circumstances for the exercise of a right of self-defence by Uganda against the DRC were not present’, the majority continued: ‘Accordingly, the Court has no need to respond to the contentions of the Parties as to whether and under what conditions contemporary international law provides for a right of self-defence against large-scale attacks by irregular forces.’ Cf. Tams (2009), p. 384, arguing that ‘the Court’s majority was far more equivocal’ in Armed Activities than in the Wall Advisory Opinion.
Hakimi (2015), p. 4.
Letter, above n. 90.
In Hakimi’s words: ‘three grounds for permitting such force are plausibly available: (1) the territorial State actively harbors or supports the non-State actors, or lacks governance authority in the area from which they operate, (2) the territorial State is unable or unwilling to address the threat that the non-State actors pose, and (3) the threat is located in the territorial State. To be clear, each of these grounds for permitting defensive force has some interpretive space and overlaps with the others. The three are best conceived as concentric circles; as one moves from the first ground to the third, the scope of permissible defensive actions expands.’ Hakimi (2015), p. 8.
At first glance, it might be unclear how Egypt could determine that Libya was unwilling or unable to suppress the militant violence if, at the time it took defensive military action, the identity of the perpetrators of the armed attack was not yet known. In order that this argument might carry any weight, it would have to be assumed that Egypt possessed intelligence that the attack emanated from a non-State actor operating from Libyan territory at the time at which it launched its airstrikes in response thereto.
For analysis of the content of this standard, see Deeks (2012).
Ibid., p. 487.
Cf. Tams (2009), p. 367, discussing States’ rejection of a right to use unilateral force against terrorists in the preceding decades.
Cf. Corten (2010), p. 196, expressing the opinion that ‘the precedent of 9/11 was certainly a turning point in the fight against terrorism insofar as it prompted States to speed up their cooperation in this domain. It is not established, though, that this turning point has led to a radical change in the rules of the jus contra bellum that might henceforth be invoked outside the context of inter-State relations.’
Chachko and Deeks (2016).
Chachko and Deeks (2016).
Ibid.
Letter, above n. 90.
Hakimi (2015), p. 8.
Ibid., pp. 9–12. Kenya’s 2011 use of force in self-defence against Al-Shabaab militants operating from ungoverned areas of Somalia—an operation which garnered broad international backing, albeit after Kenya had secured the consent of the de jure Somali government—could also be viewed as supporting this standard. For discussion of this use of force, see Birkett (2013).
See Hakimi (2015), p. 10, citing Armed Activities, above n. 11, p. 314 (separate opinion of Judge Kooijmans); Armed Activities, above n. 11, p. 337 (separate opinion of Judge Simma).
Wall Advisory Opinion, above n. 10, p. 194.
Letter, above n. 90.
Cf. Ruys (2008), p. 359, observing, with respect to Turkey’s operations against non-State actors in Iraq, that ‘the lack of explicit legal justification and the generally muted reactions of third states make it difficult to identify the opinio juris implicit in the Turkish precedent’.
Thanks to Luca Ferro for the discussion that led to the inclusion of this clarification (and the terms thereof).
Nicaragua, above n. 84, p. 94.
Ibid.; Legality of the Threat or Use of Nuclear Weapons (Advisory Opinion) [1996] ICJ Reports 226, p. 245; Oil Platforms, above n. 104, p. 183; Armed Activities, above n. 11, p. 223.
For a more elaborate account of the facts of this case, see Jennings (1938), pp. 82–84.
Exchange of Diplomatic Notes between the United Kingdom and Ireland and the United States of America, Letter from Mr. Webster to Mr. Fox, 24 April 1841 (1841–1842) 29 British and Foreign State Papers 1129, p. 1138.
Ibid.
See Gray (2018), p. 158, noting that ‘irrespective of the very dubious status of the Caroline incident as a precedent, necessity and proportionality have played a crucial role in state justification of the use of force in self-defence and in international response.’.
See Gardam (2004), p. 140, arguing that ‘Irrespective of the theoretical basis legitimating the use of force, necessity and proportionality are regarded as being essential components thereof, although their articulation and application will vary depending on the context.’.
Ibid., p. 152.
Ibid., pp. 149–152.
Nicaragua, above n. 84, p. 122.
Ruys (2010), p. 95.
Ibid., p 108.
Many would also consider the ‘unwilling or unable’ test to constitute an aspect of the necessity criterion. See ILA Report, above n. 115, pp. 16–17. For application of this standard to the instant use of force, see above nn. 126–138 and accompanying text.
Ago (1980), p. 69.
Gardam (2004), p. 162.
Letter, above n. 90.
Ibid.
Green (2015), p. 570.
See e.g. Walsh and Youssef (2016a).
Ruys (2010), p. 100.
Ibid.
Memorial Submitted by the Islamic Republic of Iran’, Oil Platforms (Islamic Republic of Iran v. United States of America) (International Court of Justice, General List No. 90, 8 June 1993), para. 4.36. See also Ruys (2010), p. 100.
Ruys (2010), p. 98, arguing that ‘Practice indicates that the need to exhaust peaceful means only plays a subsidiary role for the assessment of self-defence claims in response to a prior attack, and that unlawfulness will only result when a manifest unwillingness to address diplomatic channels can be demonstrated.’ See also Gardam (2004, p. 153, questioning whether this is a legal requirement or merely desirable.
Letter, above n. 90.
The full address is available online. ON Live, ‘الرئيس عبد الفتاح السيسي يوجه كلمة للأمة [President Abdel Fattah El Sisi’s Address to the Nation]’ (YouTube, 26 May 2017) 0:03:13–0:03:34. https://www.youtube.com/watch?v=5w5-Ngfrqio (Address).
Letter, above n. 90.
وزارة الدفاع المصرية [Egyptian Ministry of Defence], ‘ضربة القوات الجوية فى ليبيا [Air Force Strike in Libya]’ (YouTube, 26 May 2017) 0:00:22–0:00:26 https://www.youtube.com/watch?v=lRoQuj13FPE.
Hennessy-Fiske (2017); Al Jazeera and Agencies (2017).
See below nn. 200–202 and accompanying text. See also Aboulenein and Elgood (2017).
Oil Platforms, above n. 104, p. 198.
Address, above n. 179, 0:04:45–0:05:12.
Armed Activities, above n. 11, p. 223.
Ibid.
See e.g. Walsh and Youssef (2016a)
‘غارات جوية جنوبي ليبيا بعد قصف مصري لدرنة [Airstrikes in Southern Libya after Egyptian Bombing of Derna]’, Al Jazeera (28 May 2017) https://www.aljazeera.net/news/arabic/2017/5/28/غارات-جوية-جنوبي-ليبيا-بعد-قصف-مصري. See also Aboulenein and Elgood (2017).
Letter, above n. 90. As to whether can one read ‘coordination’ as meaning an invocation by Egypt of Libya’s ‘consent’ to the use of force on its territory, though the wording used is (deliberately) vague—which might per se indicate an absence of consent—that this question can be answered in the affirmative is borne out in subsequent practice. See below n. 204–205 and accompanying text.
Arimatsu and Schmitt (2014), pp. 5–6.
De Wet (2020), p. 6.
Ibid., p. 22. See also Ruys and Ferro (2016), p. 81, Gerhard Hafner, Rapporteur, ‘Present Problems of the Use of Force in International Law Sub-group: Intervention by Invitation’ (2009) 73 Annuaire de l’Institut de Droit international 396–402; Corten (2014), p. 453; Doswald-Beck (1985), pp. 199–200.
See Sect. 2.
De Wet (2020), p. 73.
Ibid.
Al-Warfalli (2015).
رسالة مؤرخة 27 أيار/مايو 2017 موجهة إلى رئيس مجلس األمن منن الممثن الناائ لمصر لاى األم المتحاة [Letter dated 27 May 2017 from the Permanent Representative of Egypt to the United Nations addressed to the President of the Security Council], UN Doc. S/2017/456, 1 June 2017.
See Aboulenein (2017).
Mohammed Hassan Amer, ‘قائد سلاح الجو الليبي لـ"الوطن": الضربة المصرية تمَّت بالتنسيق معنا [Commander of the Libyan Air Force to El Watan: The Egyptian Strike was Carried Out in Coordination with Us]’, El Watan (26 May 2017) https://www.elwatannews.com/news/details/2134226.
Ibid. Cf. Truitte (2018), p. 7, detailing the conflict between the Shura Council of Mujahideen in Derna and Islamic State. On the targets of the airstrikes, see above nn. 180–184 and accompanying text.
UN SCOR, 72nd sess, 7927th mtg, UN Doc. S/PV.7927, 19 April 2017).
‘Speech by by H.E. President Abdel Fattah El Sisi at the Western Military Zone’, State Information Service (23 June 2020) https://www.sis.gov.eg/Story/147756.
Letter, above n. 90. Of course, the Letter includes further legal justifications in the form of self-defence and, at least arguably, authorisation on the part of the UNSC.
Bannelier-Christakis (2016), p. 757.
UNSC Res. 2259, above n. 35, para. 3. See also UNSC Res. 2278, above n. 35, preamble para. 3. See also De Wet (2020), p. 62, citing UN SCOR 70th sess, 7598th mtg, UN Doc. S/PV.7598, 23 December 2015. De Wet observes that ‘While not adopted under Chapter VII of the UN Charter, the unanimous support within the UNSC for the resolution reflected strong international political backing of the Government of National Accord.’.
Gray (2018), p. 105, citing UNSC Res. 2238, UN Doc. S/RES/2238, 10 September 2015; ‘Joint Communique on Libya’, 22 September 2016, https://eeas.europa.eu/node/10289_en.
De Wet (2020), p. 69, citing UNSC Res. 2259, above n. 35, para. 3.
Cf. Bannelier-Christakis (2016), pp. 756–758.
References
Aboulenein A (2017) Egypt to press ahead with air strikes after Christians attacked. Reuters (29 May 2017). https://www.reuters.com/article/us-libya-security-idUSKBN18P0GP
Aboulenein A, Elgood G (2017) Is Egypt bombing the right militants in Libya? Reuters (31 May 2017). https://www.reuters.com/article/us-egypt-security-analysis-idUSKBN18R2GE
Ago R (1980) Addendum to the eighth report on state responsibility, by Mr. Roberto Ago. Yearb Int Law Comm II:13–70
Akande D, Milanovic M (2015) The constructive ambiguity of the Security Council’s ISIS resolution. EJIL: Talk! https://www.ejiltalk.org/the-constructive-ambiguity-of-the-security-councils-isis-resolution/. Accessed 16 October 2021
Al-Warfalli A (2015) Libya's Haftar appointed army chief for recognized government. Reuters (2 March 2015). https://www.reuters.com/article/us-libya-security-army/libyas-haftar-appointed-army-chief-for-recognized-government-idUSKBN0LY1AB20150302
Anderson JL (2015) The unravelling. The New Yorker (16 February 2015). https://www.newyorker.com/magazine/2015/02/23/unravelling
Antonopoulos C (2008) Force by armed groups as armed attack and the broadening of self-defence. Neth Int Law Rev 55:159–180
Aragón Cardiel JL, Davis A, Macherel L (2018) Modern self-defense: The use of force against non-military threats. Columbia Hum Rights Law Rev 49:99–182
Arimatsu L, Schmitt MN (2014) Attacking ‘Islamic State’ and the Khorasan group: surveying the international law landscape. Columbia J Transnatl Law Bull 53:1–29
Badi E (2020) Russia isn’t the only one getting its hands dirty in Libya. Foreign Policy (21 April 2020). https://foreignpolicy.com/2020/04/21/libyan-civil-war-france-uae-khalifa-haftar/
Bannelier K, Christakis T (2013) Under the UN security council’s watchful eyes: military intervention by invitation in the Malian conflict. Leiden J Int Law 26:855–874
Bannelier-Christakis K (2016) Military interventions against ISIL in Iraq, Syria and Libya, and the legal basis of consent. Leiden J Int Law 29:743–775
Birkett DJ (2013) The legality of the 2011 Kenyan invasion of Somalia and its implications for the jus ad bellum. J Confl Security Law 18:427–451
Blum YZ (1976) State response to acts of terrorism. Germ Yearb Int Law 19:223–237
Bowett D (1972) Reprisals involving recourse to armed force. Am J Int Law 66:1–36
Bozkurt A (2019) Full text of new Turkey, Libya sweeping security, military cooperation deal revealed. Nordic Monitor (14 December 2019). https://www.nordicmonitor.com/2019/12/full-text-of-new-turkey-libya-sweeping-security-military-cooperation-deal-revealed/
Brownlie I (1961) The use of force in self-defence. Br Yearb Int Law 37:183–268
Brunnée J, Toope SJ (2018) Self-defence against non-state actors: are powerful states willing but unable to change international law? Int Comp Law Q 67:263–286
Casey-Maslen S (2020) Jus ad bellum: the law on inter-state use of force. Hart Publishing, Oxford
Cassese A (2001) Terrorism is also disrupting some crucial legal categories of international law. Eur J Int Law 12:993–1001
Chachko E, Deeks A (2016) Which states support the ‘unwilling and unable’ test? Lawfare. https://www.lawfareblog.com/which-states-support-unwilling-and-unable-test. Accessed 16 October 2021
Constantinou A (2000) The right of self-defence under customary international law and article 51 of the United Nations Charter. Bruylant, Brussels
Corten O (2010) The law against war: the prohibition on the use of force in contemporary international law. Hart Publishing, Oxford
Corten O (2014) Le droit contre la guerre, 2nd edn. Pedone, Paris
Corten O (2016a) The ‘unwilling or unable’ test: Has it been, and could it be, accepted? Leiden J Int Law 29:777–799
Corten O (2016b) A plea against the abusive invocation of self-defence as a response to terrorism. EJIL: Talk! https://www.ejiltalk.org/a-plea-against-the-abusive-invocation-of-self-defence-as-a-response-to-terrorism/. Accessed 16 October 2021
Cot J-P, Forteau M, Pellet A (eds) (2005) La Charte des Nations Unies: commentaire article par article, 3rd edn. Economica, Paris
De Wet E (2020) Military assistance on request and the use of force. Oxford University Press, Oxford
Deeks A (2012) ‘Unwilling or unable’: towards a normative framework for extraterritorial self-defence. Va J Int Law 52:483–550
Dinstein Y (2005) War, aggression and self-defence, 4th edn. Cambridge University Press, Cambridge
Doswald-Beck L (1985) The legal validity of military intervention by invitation of the government. Br Yearb Int Law 56:189–252
Ducheine P (2008) Krijgsmacht, geweldgebruik & terreurbestrijding. Wolf Legal Publishers, Nijmegen
Eljarh M (2014) The Supreme Court decision that’s ripping Libya apart. Foreign Policy (4 November 2014). https://foreignpolicy.com/2014/11/06/the-supreme-court-decision-thats-ripping-libya-apart
Fahim K, Zway SA (2014) Violence and uncertainty mar Libyan election for a new parliament. The New York Times (25 June 2014). https://www.nytimes.com/2014/06/26/world/africa/violence-and-uncertainty-mar-libyan-election-for-a-new-parliament.html
Fahim K, Zway SA (2015) Libya’s rival factions sign deal for unity government. The New York Times (17 December 2015). https://www.nytimes.com/2015/12/18/world/africa/libya-unity-government.html
Feder NM (1987) Reading the U.N. Charter connotatively: toward a new definition of armed attack. NY Univ J Int Law Politics 19:395–432
Ferro L (2020) A Libyan playground for foreign powers: presenting the case for “negative equality”. Opinio Juris. http://opiniojuris.org/2020/06/26/a-libyan-playground-for-foreign-powers-presenting-the-case-for-negative-equality/. Accessed 16 October 2021
Ferro L (2021) The doctrine of ‘negative equality’ and the silent majority of states. J Use Force Int Law 8:4–33
Gardam J (2004) Necessity, proportionality and the use of force by states. Cambridge University Press, Cambridge
Gazzini T (2005) The changing rules on the use of force in international law. Manchester University Press, Manchester
Gray C (2018) International law and the use of force, 4th edn. Oxford University Press, Oxford
Green JA (2015) The article 51 reporting requirement for self-defense actions. Va J Int Law 55:563–624
Hakimi M (2015) Defensive force against non-state actors: the state of play. Int Law Stud 91:1–31
Hennessy-Fiske M (2017). Islamic state claims responsibility for attack on Coptic Christians in Egypt that left 29 dead. Los Angeles Times (27 May 2017). https://www.latimes.com/world/la-fg-isis-egypt-20170527-story.html
Henry E (2017) Alleged acquiescence of the international community to revisionist claims of international customary law (with special reference to the jus contra bellum regime). Melb J Int Law 18:260–297
Higgins R (1963) The development of international law through political organs of the United Nations. Oxford University Press, London, New York
International Crisis Group (2015) Libya: getting Geneva right (Middle East and North Africa Report No. 157, 26 February 2015). https://www.crisisgroup.org/middle-east-north-africa/north-africa/libya/libya-getting-geneva-right
International Crisis Group (2016) The Libyan political agreement: time for a reset (Middle East and North Africa Report No. 170, 4 November 2016). https://www.crisisgroup.org/middle-east-north-africa/north-africa/libya/libyan-political-agreement-time-reset
International Crisis Group (2020) Turkey wades into Libya’s troubled waters (Europe Report No. 257, 30 April 2020). https://www.crisisgroup.org/europe-central-asia/western-europemediterranean/turkey/257-turkey-wades-libyas-troubled-waters
Jennings RY (1938) The Caroline and McLeod cases. Am J Int Law 32:82–99
Kearley T (1999) Raising the Caroline. Wis Int Law J 17:325–346
Kirkpatrick DD (2012) Braving areas of violence, voters try to reshape Libya. The New York Times (8 July 2012). https://www.nytimes.com/2012/07/08/world/africa/libyans-vote-in-first-election-in-more-than-40-years.html
Kirkpatrick DD, Callimachi R (2015). Islamic state video shows beheadings of Egyptian Christians in Libya. The New York Times (15 February 2015). https://www.nytimes.com/2015/02/16/world/middleeast/islamic-state-video-beheadings-of-21-egyptian-christians.html
Lubell N (2010) Extraterritorial use of force against non-state actors. Oxford University Press, Oxford
Maghur AK (2014) A legal look into the Libyan Supreme Court ruling. Atlantic Council (8 December 2014). https://www.atlanticcouncil.org/blogs/menasource/a-legal-look-into-the-libyan-supreme-court-ruling/
Malanczuk P (1997) Akehurst’s modern introduction to international law, 7th edn. Routledge, London
O’Connell ME (2013) Dangerous departures. Am J Int Law 107:380–386
O’Connell ME, Tams CJ, Tladi D (2019) Self-defence against non-state actors. Cambridge University Press, Cambridge
QNA (2020) Qatar, Libya sign MoU on security cooperation. The Peninsula (27 October 2020). https://thepeninsulaqatar.com/article/27/10/2020/Qatar,-Libya-sign-MoU-on-security-cooperation
Randelzhofer A, Nolte G (2012) Article 51. In: Simma B et al (eds) The charter of the United Nations, a commentary, vol II. Oxford University Press, Oxford, pp 1397–1428
Redsell G (2007) Illegitimate, unnecessary and disproportionate: Israel’s use of force in Lebanon. Camb Student L Rev 3:70–85
Reinold T (2011) State weakness, irregular warfare, and the right to self-defense post-9/11. Am J Int Law 105:244–286
Roth BR (2010) Secessions, coups and the international rule of law: assessing the decline of the effective control doctrine. Melb J Int Law 11:393–440
Ruys T (2008) Quo vadit jus ad bellum?: a legal analysis of Turkey’s military operations against the PKK in northern Iraq. Melb J Int Law 9:334–364
Ruys T (2010) ‘Armed attack’ and article 51 of the UN Charter: evolutions in customary law and practice. Cambridge University Press, Cambridge
Ruys T, Ferro L (2016) Weathering the storm: legality and legal implications of the Saudi-led military intervention in Yemen. Int Comp Law Q 65:61–98
Ruys T, Corten O, Hofer A (eds) (2018) The use of force in international law: a case-based approach. Oxford University Press, Oxford
Ryan Y (2014) Libya’s parliament moves to small port city as dangers in Tripoli increase. The Washington Post (5 October 2014). https://www.washingtonpost.com/world/middle_east/tripoli-is-so-dangerous-that-even-libyas-parliament-has-moved-out/2014/10/03/9952b54e-4053-11e4-b03f-de718edeb92f_story.html
Samaan M, Walsh D (2017) Egypt declares state of emergency, as attacks undercut promise of security. The New York Times (9 April 2017). https://www.nytimes.com/2017/04/09/world/middleeast/explosion-egypt-coptic-christian-church.html
Scharf MP (2016) How the war against ISIS changed international law. Case Western Reserve J Int Law 48:15–68
Schmitt MN (2007) 21st century conflict: can the law survive? Melb J Int Law 8:443–476
Schmitt MN (2008) ‘Change direction’ 2006: Israeli operations in Lebanon and the international law of self-defense. Mich J Int Law 29:127–164
Stahn C (2003) Terrorist acts as ‘armed attack’: The right to self-defense, article 51(1/2) of the UN Charter, and international terrorism. Fletcher Forum World Affairs 27:35–54
Starski P (2017) Silence within the process of normative change and evolution of the prohibition on the use of force: Normative volatility and legislative responsibility. J Use Force Int Law 4:14–65
Talmon S (2013) Recognition of opposition groups as the legitimate representative of a people. Chin J Int Law 12:219–253
Tams CJ (2009) The use of force against terrorists. Eur J Int Law 20:359–397
Tladi D (2013) The nonconsenting innocent state: the problem with Bethlehem’s principle. Am J Int Law 107:570–576
Truitte K (2018) The Derna Mujahideen Shura Council: a revolutionary Islamist coalition in Libya. Perspect Terrorism 12:4–17
Van Steenberghe R (2010) Self-defence in response to attacks by non-state actors in the light of recent state practice: a step forward? Leiden J Int Law 23:183–208
Van Steenberghe R (2016) The law of self-defence and the new argumentative landscape on the expansionists’ side. Leiden J Int Law 29:43–65
Vandewalle D (2012) A history of modern Libya, 2nd edn. Cambridge University Press, Cambridge
Verhoeven J (2002) Les « étirements » de la légitime défense. Annu Fran Droit Int 48:49–80
Visser L (2019) May the force be with you: The legal classification of intervention by invitation. Neth Int Law Rev 66:21–45
Walsh D, Ezz M (2018) ISIS says it was behind deadly attack on Christians in Egypt. The New York Times (2 November 2018). https://www.nytimes.com/2018/11/02/world/middleeast/egypt-coptic-christians-ambush.html
Walsh D, Youssef N (2016a) Gunmen in Egypt force Coptic Christian pilgrims from buses and kill 28. The New York Times (26 May 2016). https://www.nytimes.com/2017/05/26/world/middleeast/egypt-coptic-christian-attack.html
Walsh D, Youssef N (2016b) ISIS claims responsibility for Egypt church bombing and warns of more to come. The New York Times (13 December 2016). https://www.nytimes.com/2016/12/13/world/middleeast/egypt-isis-bombing-coptic-christians.html
Wintour P (2019) Libya crisis: Egypt’s Sisi backs Haftar assault on Tripoli. The Guardian (14 April 2019). https://www.theguardian.com/world/2019/apr/14/libya-crisis-egypt-sisi-backs-haftar-assault-on-tripoli
Wintour P (2020) UN-backed Libyan forces take key airbase from rebel general. The Guardian (18 May 2020). https://www.theguardian.com/world/2020/may/18/forces-allied-to-libyan-government-retake-key-al-watiya-airbase
Wippman D (1996) Military intervention, regional organizations and host-state consent. Duke J Comp Int Law 7:209–240
Youssef N (2017) Gunmen attack Cairo church, killing at least 9. The New York Times (29 December 2017). https://www.nytimes.com/2017/12/29/world/middleeast/egypt-church-attack.html
Acknowledgements
The author wishes to acknowledge the invaluable assistance of Ahmed Abofoul in locating many of the Arabic-language sources quoted and cited in this article and for translating them into English. The author is also grateful to Luca Ferro for his critical review and ensuing discussion of an earlier draft of this article. Finally, the author would like to thank the members of the Editorial Board for their constructive feedback on the manuscript prior to publication.
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Birkett, D.J. Another Hole in the Wall? Evaluating the Legality of Egypt’s 2017 Airstrikes Against Non-State Targets in Libya Under the Jus ad Bellum. Neth Int Law Rev 69, 83–114 (2022). https://doi.org/10.1007/s40802-022-00210-4
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DOI: https://doi.org/10.1007/s40802-022-00210-4