The 12th Army (Russian Civil War 1st Formation) of the Soviet Red Army was first formed from Soviet forces in the north-eastern Caucasus in 1918.
The 12th Army (Russian Civil War 2nd Formation) was formed from the 1st and 3rd Ukrainian Red Armies in central Ukraine in the summer of 1919. In July 1920 Simon Aralov was chief of intelligence with this unit. it was disbanded in 1920.[1]
Second World War
The 12th Army (1st Formation) (RKKA) of the Soviet Red Army was formed from the Southern (Cavalry-Mechanised) Army Group of the Kiev Special Military District during 1939–40.[2]
10th, 11th and 12th Fortified Regions, and artillery, engineering and other units.[3]
It participated in the frontier battle to the west of Stanislau. In the second half of July as part of the Soviet Southern Front it conducted defensive fights in the direction of Uman. During the Battle of Uman, the Twelfth Army was caught in a huge encirclement south of Kyiv along with the 6th Army. Thus the army's headquarters was disbanded on 10 August 1941, after the battle.
The 12th Army was reformed in August 1941 as part of the Soviet Southern Front on the basis of 17th Rifle Corps.[2] On 1 September 1941 its structure included 270th and 274th Rifle Divisions, the 11th Tank Division, 268th and 374th Corps Artillery Regiments, 64th and 181st Fighter Aviation Regiments, and a number of separate formations.[4]
The Army defended the left bank of the Dnepr around Zaporozhye, from the end of September to the beginning of December, 1941. It participated in the Donbas defensive, Rostov defensive and offensive, in January, 1942 in the Barvenkovo–Lozovaya Offensive operations, in the subsequent conducted defensive fights in Donbas and on Northern Caucasus (part of the Battle of the Caucasus). In the middle of April 1942 the 261st Rifle Division under Colonel A.M. Ilyin, the 4th Rifle Division (Colonel Ivan Rosly), the 74th Rifle Division under General F.E.Sheverdin, the 176th Rifle Division (General Vladimir Martsinkevich) and 54th Tank Brigade under Colonel K.S. Minarov were assigned to the Army.
It was later in 1942 reorganised as a defensive zone HQ, but then reformed again by conversion of the previous 5th Tank Army in mid April 1943.[5] It joined the Southwestern Front. Its structure included the 172nd, 203rd, 244th, 333rd and 350th Rifle Divisions and other formations. In April – July the Army was in Front reserve, and then participated in the Donbas and Zaporozhye offensive operations. In November the army HQ was disbanded, with its forces transferred to other armies.
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