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  1. Soviet Union | History, Leaders, Flag, Map, & Anthem | Britannica

    Dec 19, 2025 · Soviet Union (Union of Soviet Socialist Republics; U.S.S.R.), former northern Eurasian empire (1917/22–1991) stretching from the Baltic and Black seas to the Pacific Ocean and, in its final …

  2. Soviet Union - Wikipedia

    During its existence, the Soviet Union produced many significant social and technological achievements and innovations. The USSR was one of the most advanced industrial states during its existence. It …

  3. Soviet Union - Wikiwand

    The Union of Soviet Socialist Republics (USSR), commonly known as the Soviet Union, was a transcontinental country that spanned much of Eurasia from 1922 until ...

  4. Soviet Union - New World Encyclopedia

    The Soviet Union was one of the dominant political entities of the twentieth century. The official name was the Union of Soviet Socialist Republics (USSR). The Russian Revolution brought to power the …

  5. Soviet Union - Simple English Wikipedia, the free encyclopedia

    The Soviet Union was officially created in December 1922 as the union of the Russian (also known as Bolshevist Russia), Ukrainian, Byelorussian, and Transcaucasian Soviet republics ruled by the …

  6. Soviet Union - Countries, Cold War & Collapse | HISTORY

    Sep 1, 2017 · In response to NATO, the Soviet Union in 1955 consolidated power among Eastern bloc countries under a rival alliance called the Warsaw Pact, setting off the Cold War.

  7. What Was the USSR and Which Countries Were in It? - ThoughtCo

    May 6, 2025 · The Union of Soviet Socialist Republics (also known as the USSR or the Soviet Union) consisted of Russia and 14 surrounding countries. The USSR's territory stretched from the Baltic …

  8. Formation of the Soviet Union | World History - Lumen Learning

    The Soviet Union, officially the Union of Soviet Socialist Republics, was a socialist state in Eurasia that existed from 1922 to 1991. It was nominally a supranational union of national republics, but its …

  9. The Soviet Union - WorldAtlas

    Jul 16, 2021 · The Soviet Union was a one-party state in which the Communist Party controlled all the levers of government. The Soviet Union was composed of 15 separate units, called republics.

  10. Soviet Union - Communism, Totalitarianism, Purges | Britannica

    Dec 14, 2025 · Soviet Union - Communism, Totalitarianism, Purges: The last phase of Lenin’s life—first partial, then total disablement, then death—had fortuitously provided a sort of transitional period for a …