Azerbaijan Soviet Socialist Republic

The Azerbaijan Soviet Socialist Republic, also referred to as the Azerbaijani Soviet Socialist Republic, Azerbaijan SSR, Azerbaijani SSR, AzSSR, Soviet Azerbaijan or simply Azerbaijan, was one of the constituent republics of the Soviet Union between 1922 and 1991. Azerbaijan SSR was created on 28 April 1920 following the Red Army invasion of Azerbaijan. When the Russian Soviet Federative Socialist Republic brought pro-Soviet figures to power in the region, the first two years of the Azerbaijani SSR were as an independent country until incorporation into the Transcaucasian SFSR, along with the Armenian SSR and the Georgian SSR.

In December 1922, the Transcaucasian SFSR became part of the newly established Soviet Union. The Constitution of Azerbaijan SSR was approved by the 9th Extraordinary All-Azerbaijani Congress of Soviets on 14 March 1937. On 5 February 1991, Azerbaijan SSR was renamed the Republic of Azerbaijan according to the Decision No.16-XII of Supreme Soviet of Azerbaijan approving the Decree of the President of Azerbaijan SSR dated 29 November 1990, remained in the USSR for the period before the declaration of independence in October 1991. The Constitution of the Azerbaijan SSR ceased to exist in 1995, upon the adoption of the new Constitution of Azerbaijan.

The name "Azerbaijan" originates as the "Land of Atropates", an Achaemenid then Hellenistic-era king over a region in present-day Iranian Azarbaijan and Iranian Kurdistan, south of the modern state. Despite this difference, the present name was chosen by the Musavat to replace the Russian names Transcaucasia and Baku in 1918. "Azerbaijan" derives from Persian Āzarbāydjān, from earlier Ādharbāyagān and Ādharbādhagān, from Middle Persian Āturpātākān, from Old Persian Atropatkan.

From its founding it was officially known as the Azerbaijan Socialist Soviet Republic. When the Transcaucasian Socialist Federative Soviet Republic was abolished, the name was changed to the Azerbaijan Soviet Socialist Republic according to the 1937 and 1978 Azerbaijan SSR constitutions. Upon independence, it was renamed to the Republic of Azerbaijan (or Azerbaijani Republic) in 1991. The current official name was retained after the new Constitution of Azerbaijan was adopted in 1995.

The Azerbaijan SSR was established on 28 April 1920 after the surrender of the government of the Azerbaijan Democratic Republic to local Bolsheviks led by Mirza Davud Huseynov and Nariman Narimanov and the invasion of the Bolshevik 11th Red Army.

On 13 October 1921, the Soviet republics of Russia, Armenia, Azerbaijan, and Georgia signed an agreement with Turkey known as the Treaty of Kars. The previously independent Nakhcivan SSR would also become an autonomous ASSR within Azerbaijan by the Treaty of Kars.

Borders of Azerbaijan and Armenia, like elsewhere in the USSR, were redrawn several times, yet neither side was completely satisfied with the results.

On 12 March 1922 the leaders of Azerbaijan, Armenian, and Georgian Soviet Socialist Republics established a union known as the Transcaucasian Soviet Federal Socialist Republic (TSFSR). This was the first attempt at a union of Soviet republics, preceding the USSR. The Union Council of TSFSR consisted of the representatives of the three republics – Nariman Narimanov (Azerbaijan), Polikarp Mdivani (Georgia), and Aleksandr Fyodorovich Miasnikyan (Armenia). The First Secretary of the Transcaucasian Communist Party was Sergo Ordzhonikidze.