Treaty on the Creation of the USSR on 30 December 1922 by a conference of delegations from the Russian SFSR, the Transcaucasian SFSR, the Ukrainian SSR and the Byelorussian SSR. The Treaty and the Declaration were confirmed by the 1st Congress of Soviets of the USSR and signed by heads of delegations Mikhail Kalinin, Mikhail Tskhakaya, Mikhail Frunze and Grigory Petrovsky, Aleksandr Chervyakov respectively on December 30, 1922. The treaty provided flexibility to admit new members. Therefore, by 1940 the Soviet Union grew from the founding four republics to 15 republics. On 8 December 1991, Russian, Ukrainian and Belarusian Presidents signed the Belavezha Accords. The agreement declared
1991 Crimean sovereignty referendum 1991 Crimean sovereignty referendum A referendum on sovereignty was held in the Crimean Oblast of the Ukrainian SSR on 20 January 1991 two months before the 1991 All-Union referendum. Voters were asked whether they wanted to re-establish the Crimean Autonomous Soviet Socialist Republic, which had been abolished in 1945. The proposal was approved by 94% of voters. The Crimean ASSR was originally created in 1921, as part of the Russian SFSR in the Soviet Union. Crimea was invaded by Nazi Germany during World War II, and when the region was reclaimed by the USSR in 1944, the Crimean Tatars, Armenians,