Crimea in the Soviet Union

Several different governments controlled the Crimean Peninsula during the period of the Soviet Union, from the 1921 to 1991. The government of Crimea from 1921 to 1936 was the Crimean Autonomous Socialist Soviet Republic, which was an Autonomous Soviet Socialist Republic within the Russian Soviet Federative Socialist Republic (SFSR); the name was altered slightly to the Crimean Autonomous Soviet Socialist Republic from 1936 to 1945.

Source: Wikipedia — Crimea in the Soviet Union (CC BY-SA 4.0)