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  1. Soviet Union - Wikipedia

    The USSR was one of the most advanced industrial states during its existence. It had the world's second-largest economy and largest standing military. As a nuclear state, it wielded the …

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

    3 days ago · During the period of its existence, the Union of Soviet Socialist Republics was by area the world’s largest country. It was also one of the most diverse, with more than 100 …

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

    May 6, 2025 · The USSR was a large communist country made up of Russia and 14 other countries. The USSR was founded in 1922 and dissolved in 1991 after Gorbachev's reforms …

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

    Sep 1, 2017 · A 1922 treaty between Russia, Ukraine, Belarus and Transcaucasia (modern Georgia, Armenia and Azerbaijan) formed the Union of Soviet Socialist Republics (USSR).

  5. History of the Soviet Union - Wikipedia

    The history of the Soviet Union (USSR) (1922–1991) began with the ideals of the Russian Bolshevik Revolution and ended in dissolution amidst economic collapse and political …

  6. Soviet Union - New World Encyclopedia

    Efforts to develop a capitalist economy while creating a new socialist government system failed. What resulted was a command economic system with an increasingly totalitarian political …

  7. The Soviet Union - WorldAtlas

    Jul 16, 2021 · The Soviet Union, formally known as the Union of Soviet Socialist Republics, or USSR for short, was a country that was composed of 15 different units, known as republics. …

  8. The Soviet Socialist Republics | World History - Lumen Learning

    The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a federation of Soviet Republics that were outwardly independent nations, but existed essentially as satellite …

  9. collapse of the Soviet Union - Encyclopedia Britannica

    Dec 1, 2025 · collapse of the Soviet Union, sequence of events that led to the dissolution of the Soviet Union on December 31, 1991. The former superpower was replaced by 15 independent …

  10. Soviet Union Timeline - Have Fun With History

    Feb 8, 2024 · The Union of Soviet Socialist Republics (USSR) was established on December 30, 1922. It was formed through the Treaty on the Creation of the USSR, which unified several …