Mountain Autonomous Soviet Socialist Republic or Mountain ASSR (Russian: Го́рская АССР Gorskaya ASSR) was a short-lived autonomous republic within the Russian SFSR in the Northern Caucasus that existed from January 20, 1921 to July 7, 1924.The Mountainous Republic of the Northern Caucasus was created on parts of Kuban and Terek Oblasts by the indigenous nationalities after the Russian Revolution; however, Soviet rule was installed on this territory after the Red Army conquered the Northern Caucasus in the course of the Russian Civil War, and the former republic was transformed into a Soviet one.