Soviet Union

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The Soviet Union (Russian: Советский Союз, Sovetsky Soyuz), officially the Union of Soviet Socialist Republics (Russian: Союз Советских Социалистических Республик, Soyuz Sovetskikh Sotsialisticheskikh Respublik), was a socialist state that extended throughout Central Asia, the Caucasus, and Eastern Europe. It composed of 15 different constituent republics, with the Russian Soviet Federative Socialist Republic as the administrative state. The Soviet Union existed from 1922 to 1991. Its communist government collapsed on 29 August 1991, and on 26 December 1991, the union was split into 15 non-communist republics, most notably the Russian Federation.

The Soviet Union plays a prominent role in several novels of the Ryanverse.