The Soviet Union , officially the Union of Soviet Socialist Republics , also known unofficially as Russia , was a socialist state in Eurasia that existed from 1922 to 1991. Nominally a union of multiple subnational Soviet republics, its government and economy were highly centralized in a state that was unitary in most respects. The country was a one-party federation, governed by the Communist Party with Moscow as its capital. Wikipedia*
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