After the end of the Russian Civil War, the Red Army demobilized and transitioned to a peacetime footing, resulting in the reduction of the number of cavalry divisions to eleven by the end of 1921. On 10 June 1922, RSVR released a new TO&E, which reduced the division's authorized strength to 5,598 personnel and 5,340 horses. The cavalry division was to include three two-regiment brigades, separate communications and sapper squadrons, and a horse artillery battalion, along with support units and headquarters. In November 1922, each cavalry regiment's fourth squadron was eliminated due to a shortage of horses. In 1925 three territorial cavalry divisions were formed, bringing the total number of divisions to fourteen. In June 1926, RVSR introduced a three-year plan for the cavalry branch, which eliminated brigades and reduced divisions to four four-squadron regiments. The new divisional TO&E also included two reserve squadrons, a machine-gun squadron, and divisional artillery. Territorial divisions also had a similar structure, but with six regiments and no reserve squadrons. In 1931, due to the increasing mechanization of the Red Army, cavalry divisions were fully or partially reorganized to include four cavalry, one horse artillery, and one mechanized regiment with tanks and armored cars, and communications and sapper squadrons. A year later, five separate "national" cavalry brigades were expanded into divisions, initially retaining the original numbers but in 1936 were renumbered 17 through 21. Their national designations were removed in the summer of 1940. As a result of these reorganizations, the Red Army now had 20 cavalry divisions, divided into 16 full-strength (including five mountain cavalry), three territorial, and one newly formed kolkhoz division. The
People's Commissariat for Defense approved a new plan in March 1935, which proposed to form nine new cavalry divisions numbered 23 through 31, and transfer territorial divisions to full strength. In August a new TO&E was created, authorizing a strength of 6,600 personnel for a regular cavalry division with four cavalry, mechanized, and horse artillery regiments, and separate communications and sapper squadrons, totaling 97 guns, 74 tanks, and 212 cars. In April 1936 five Cossack divisions were formed from other cavalry divisions, resurrecting the traditions of the old Cossack units. By 1936 the Red Army included 36 cavalry divisions, broken down as follows: 20 regular divisions with 6,600 men each, four reinforced divisions with 7,600 men each, 3 territorial divisions with 3,500 men, and five mountain divisions with 2,600 men each. A new cavalry division TO&E was released in March 1938. The mechanized regiment was eliminated and replaced by a tank regiment, and the horse artillery regiment was reduced to a battalion. Reinforced cavalry divisions in the Far East retained the mechanized and horse artillery regiments, while mountain cavalry divisions included only three cavalry divisions and a mountain-horse artillery battalion. As a result of the increasing role of tank and mechanized units, cavalry lost its importance and began to drastically decline. By the beginning of 1939 the number of cavalry divisions dropped to 26 as divisions disbanded or were reduced in size. Large cuts after the end of the
Winter War in spring 1940 further reduced the number of cavalry divisions to 13. ==Cavalry divisions in World War II==