The Union of Soviet Socialist Republics was a federation of a number of Soviet republics. The union was primarily led by Vladimir Lenin. Russia was the largest republic of the republics according to the population of the country, followed by Ukraine.
System of government
The Soviet Union was governed by a single political party, dominated by the Communist Party, until 1990.
Although the Soviet Union was in name a union of the republics of the Soviet Union (which numbered 15 republics after 1956) with Moscow as its capital, but in fact it was a highly centralized state and its economy was a planned economy.
Soviet Union - Pictures, audio, and video recordings on Wikimedia Commons (English)
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Soviet Union International Virtual Authority Identifier File Database (English)
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Soviet Union identifier for the geo-database site Genomics (English)
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Soviet Union Integrated Power File Identifier (English)