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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. An NPT-designated state, it wielded the …

  2. 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 …

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

    Oct 26, 2025 · 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 …

  4. Former Soviet Union (USSR) Countries - WorldAtlas

    Feb 14, 2023 · The Soviet Union (or the Union of Soviet Socialist Republics - USSR) was a giant single-party communist state formed by the federal union of 15 national republics. It existed …

  5. 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).

  6. Everything you should know about the USSR - Russia Beyond

    The country called the Union of Soviet Socialist Republics (USSR) was established in 1922, when parts of the former Empire became autonomous and joined the Union after the civil war.

  7. What was the USSR? - History Skills

    The USSR, or the Union of Soviet Socialist Republics, was a historical state that existed from 1922 to 1991 in northern Eurasia. It was the first country to be based on the ideology of …

  8. History of the Soviet Union - Wikipedia

    Established in 1922 following the Russian Civil War, the Soviet Union quickly became a one-party state under the Communist Party. Its early years under Lenin were marked by the …

  9. Why Did the Soviet Union Collapse? | Britannica

    Political policies, economics, defense spending, and the Chernobyl nuclear disaster, among other factors, contributed to the collapse of the Soviet Union in 1991.

  10. USSR: The Union of Soviet Socialist Republics

    Sep 11, 2024 · The Union of Soviet Socialist Republics (USSR), commonly known as the Soviet Union, was a socialist state in Eurasia that existed from 1922 to 1991. It was a single-party …