Soviet Union (dec 30, 1922 – dec 26, 1991)

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The Soviet Union, officially the Union of Soviet Socialist Republics, (USSR), was a socialist state that spanned most of Europe and Asia during its existence from 1922 to 1991. It was nominally a federal union of multiple national republics; in practice its government and economy were highly centralized until its final years. The country was a one-party state prior to 1990 governed by the Communist Party of the Soviet Union, with Moscow as its capital within its largest and most populous republic, the Russian SFSR. It was the largest country in the world, covering over 22,402,200 square kilometres (8,649,500 sq mi), and spanning eleven time zones. The Soviet Union's five biomes were tundra, taiga, steppes, desert, and mountains. Its diverse population was officially known as the Soviet people.

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