Приволжский военный округ
By an order of the Volga Military District on 23 May 1922, the 1st Kazan Separate Rifle Brigade, formed from a rifle brigade of the 16th Rifle Division and the Saransk Reserve Brigade, was reorganized as the 1st Rifle Division. It was part of the Volga Military District and on 18 October received the honorific Kazan. Most of its units were stationed in Kazan, including the 1st Kazan Rifle Regiment. The division became a territorial division in December 1923, and on 29 July 1930 it received the honorific named for the Central Executive Committee of the Tatar ASSR. On 29 May 1936, the division was renumbered as the 86th Kazan Rifle Division named for the Central Executive Committee of the Tatar ASSR. On 3 October 1939, elements of the division were used to form the 111th Rifle Division while the remaining troops, reinforced by other units, were used to form the 86th Motor Rifle Division.