mechanised corps when it went into battle in late November and December 1942. It fought as a mechanised corps with 57th, 51st and 2nd Guards Armies during December in the mobile battles against German Panzers south of Stalingrad, and in recognition of its actions there on 9 January 1943 the 13th Mechanised Corps was redesignated as the 4th Guards Mechanised Corps." See . Later 4th Guards Mechanised Division, and 4th Guards Motor Rifle Division. 14th Tank Corps 15th Tank Corps – Formed May 1942, became 7th Guards Tank Corps July 1943. 16th Tank Corps – was part of 2nd Tank Army on formation. Became 12th Guards Tank Corps (1943) and 12th Guards Tank Division (1946). 17th Tank Corps – became 4th Guards Tank Corps after Operation Little Saturn. 18th Tank Corps 19th Tank Corps 20th Tank Corps – the 20th Tank Division can trace its history back to 12 December 1942 when the 20th Tank Corps was formed in the Moscow Defense Zone. It took part in the counter-offensives in the winter of 1942/43 and the summer 1943 offensives in the southern Ukraine. After taking part in the offensives in 1944 and early 1945, it was in Stavke Reserves when the war ended. It was allocated to the Northern Group of Forces by Directive No. 11096, where it remained through the Cold War. In later 1945, it was reorganized into the 20th Tank Division. Between 1949 and 1955, it was known as the 7th Tank Division, although as a cadre unit. IN 1955, it was restored to full strength and renamed the 20th Tank Division. It would remain in southern Poland until 1991 when it was disbanded. 21st Tank Corps 22nd Tank Corps 23rd Tank Corps 24th Tank Corps 25th Tank Corps – formed June 1942 in the Moscow Defence Zone. Originally formed previously as 25th Mechanised Corps in Kiev MD, 1941. Participated in the 'Liberation of Western Ukraine” and fought at Stalingrad, Kursk, Belgorod-Kharkov, Zhitimir-Berdichev, Rovno-Lutsk, Lvov, Vistula-Oder, Czestochowa, Berlin, Prague and other operations and actions. Converted to 25th Tank Division after the end of the war. Postwar assignment to 4th Guards Mechanised Army in the 1940s and 1950s; Withdrawn From Group of Soviet Forces, Germany/ Western Group of Forces, 20th Guards Army. Regiments (formerly brigades) designated “Novgorod.” Deactivation site: Kiev MD. 26th Tank Corps 27th Tank Corps – formed in the Moscow Defense Zone. The 27th was never