The core Bolshevik-ruled Soviet republic proclaimed after the October Revolution; the founding and largest constituent republic of the USSR from 1922, spanning Russia, Siberia, and the Russian Far East.
Renamed the Russian Federation on 25 December 1991 as the USSR dissolved, continuing as its principal legal and diplomatic successor state.
The atlas holds 4 border frames for Russian Soviet Federative Socialist Republic (RSFSR) — the shape you scrub through changes in 1917 · 1940 · 1945 · 1956.
A Cold War-era country-study reference profile specifically of the Russian SFSR as a constituent Soviet republic — the most directly polity-specific source found.