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
Spartakiad of Peoples of the USSR Spartakiad of Peoples of the USSR Spartakiad of Peoples of the USSR (, Spartakiada narodov SSSR) were mass multi-event competitions in the Soviet Union in 1956–1991, descendants of the 1928 All-Union Spartakiad that took place in Moscow. The competitions were conducted between constituent republics of the Soviet Union, while the Russian side was represented by three teams and included separate teams from Leningrad and Moscow. The competitions also were organized as winter and summer. There were 10 summer Spartakiads and 7 winter Spartakiads. In 1952 the Soviet Union decided to join the Olympic movement, and international Spartakiads ceased. However the