27 March, the division fought in the Kuban–Novorossiysk Offensive, advancing from the Kagalnitskaya area to Yekaterinodar. In May, the division was transferred to the Western Front to fight in the Polish–Soviet War, joining the 16th Army. It fought in the Western Front counterattack against the Polish Kiev Offensive, the May Offensive, between May 14 and June 8. The 21st participated in a diversionary attack towards Minsk and in fighting near Borisov. Later in June, it was transferred to the 3rd Army. Ivan Smolin took command of the division on 2 July. Between July 4 and 23, the division fought in the July Offensive, during which it attacked Dokshitsy, pursued retreating Polish troops along the Wilno–Warsaw railway line, and captured Volkovysk and Lida. During the Battle of Warsaw from July 23 to August 25, the 21st captured Grodno and Bialystok, but was ultimately defeated in the Battle of Radzymin and annihilated in the following days. Its remnants retreated through Grodno to Lida. The 21st was briefly transferred to the 15th Army in November but became part of the 3rd Army again in December. On December 13, the division received the honorific "Perm" after its place of formation. In February 1921 the division was briefly transferred to the Belomorsky Military District in the Arkhangelsk and Vologda area. However, in March, it was sent to Siberia to suppress the Ishim revolt, part of the Western Siberia Uprising, a series of peasant uprisings against Soviet rule. Directly subordinated to the assistant to the commander in chief for Siberia, the division fought in the suppression of the rebellion in the areas of Novonikolayevsk (later renamed Novosibirsk), Barnaul, Biysk, and Semipalatinsk. Interwar period Following the end of the revolt in West Siberia, in 1922, the division was directly subordinated to the commander of troops in Siberia. It became part of the Western Siberian Military District and then the Siberian Military District in 1923. Between October 1, 1925, and December 24, 1931, the division was a territorial formation, manned at a reduced strength. It became part of the 21st Territorial Rifle Corps at Novosibirsk and was initially in reserve during the 1929 Sino-Soviet conflict, fought with Chinese warlord Zhang Xueliang's Northeastern Army over control of the Chinese Eastern Railway in Manchuria. It was mobilized with the corps on July 13, and became the reserve division for the Transbaikal Group of the Special Far Eastern Army (later the