Finnish partisans were involved in attempts to overthrow the Bolshevists in Russian Karelia (East Karelia) in 1918–20, such as in the failed Aunus expedition. They also wanted to incorporate the rest of Karelia into Finland and cooperated with the short-lived Republic of Uhtua. These mainly private expeditions ended after the peace treaty of Tartu. After the end of the Russian Civil War and the establishment of the Soviet Union in 1922, the Russian part of Karelia became the Karelian Autonomous republic of the Soviet Union (ASSR) in 1923.