Key Historical Events. The ‘Mussavat’ (Nationalist) party declared the independence of Azerbaijan on 28 May 1918. On 28 April 1920 Azerbaijan was proclaimed a Soviet Socialist Republic. From 1922, with Georgia and Armenia it formed the Transcaucasian Soviet Federal Socialist Republic. In 1936 it assumed the status of one of the Union Republics of the USSR. In 1990 it adopted a declaration of republican sovereignty, and in Aug. 1991 declared itself formally independent; this was approved by 99·6% of votes at a referendum in Jan. 1992. Under the presidency of Gaidar Aliev, parliament ratified its adhesion to the CIS on 20 Sept. 1993.
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