Soviet Russia is sometimes used as a somewhat sloppy synonym to the Soviet Union — although the term Soviet Russia sometimes refers to Bolshevist Russia from the October Revolution in 1917 to 1922 (Although Russian communists officially formed RSFSR in 1918). During this short period it also included parts of Ukraine. In 1922, following the declaration of several Soviet Socialist Republics, only predominantly Russian part of RSFSR was integrated into USSR under that name. Afterwards, Soviet Russia was short un-abbreviated name of RSFSR (Russian Soviet Federated Socialist Republic) - until the collapse of the Soviet Union in 1991.
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