History of the Soviet Union

The Union of Soviet Socialist Republics (USSR),commonly known as the Soviet Union, was a socialist state in Eurasia that existed from 30 December 1922 to 26 December 1991. Nominally a union of multiple national Soviet republics, its government and economy were highly centralized. The country was a one-party state, governed by the Communist Party with Moscow as its capital in its largest republic, the Russian Soviet Federative Socialist Republic (Russian SFSR). Other major urban centres were Leningrad, Kiev, Minsk, Alma-Ata, and Novosibirsk.