The Soviet Union was formally formed on December 30, 1922, when the Treaty and Declaration on the Creation of the USSR were ratified at the First All- Union Congress of Soviets in Moscow.

Quick Scoop

  • Official founding date: December 30, 1922.
  • Full name at formation: Union of Soviet Socialist Republics (USSR).
  • Founding republics:
    • Russian SFSR
    • Ukrainian SSR
    • Byelorussian SSR
    • Transcaucasian SFSR (uniting Armenia, Azerbaijan, and Georgia).

Before and after 1922

  • Roots go back to the Bolshevik Revolution (October Revolution) of 1917, which created the Russian Soviet Federative Socialist Republic as the first communist state.
  • The Soviet Union as a multinational federal state was only officially proclaimed once civil war and consolidation of power allowed the 1922 union of these republics under a single federal government.
  • The USSR existed until its formal dissolution on December 26, 1991.

Information gathered from public forums or data available on the internet and portrayed here.