Mountain Autonomous Soviet Socialist Republic

The Mountain Autonomous Soviet Socialist Republic (Russian: Горская Автономная Советская Социалистическая Республика, romanized: Gorskaya Avtonomnaya Sovetskaya Sotsialisticheskaya Respublika; Chechen: Лаьмнийн Автономин Советийн Социалистийн Республика, romanized: Lämniyn Avtonomin Sovetiyn Socialistiyn Respublika) or Mountain ASSR (Russian: Го́рская АССР, romanized: Górskaya ASSR) was a short-lived autonomous republic within the Russian SFSR in the Northern Caucasus that existed from 20 January 1921 to 7 July 1924. The Mountainous Republic of the Northern Caucasus was created from parts of the 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.

Source: Wikipedia — Mountain Autonomous Soviet Socialist Republic (CC BY-SA 4.0)