Kotlin Island
The Kronstadt rebellion () was a 1921 insurrection of Soviet sailors, soldiers and civilians against the Bolshevik government in the Russian SFSR port city of Kronstadt. Located on Kotlin Island in the Gulf of Finland, Kronstadt defended the former capital city, Petrograd, as the base of the Baltic Fleet. For sixteen days in March 1921, rebels in Kronstadt's naval fortress rose in opposition to the Soviet government they had helped to consolidate. Led by Stepan Petrichenko, it was the last major revolt against the Bolshevik regime on Russian territory during the Russian Civil War.