artillery guns, 221 mortars, 2531 vehicles, 194 tractors and 39 motorcycles. Colonel Grinberg, who was the temporary commander of the 12th Mechanized Corps after the death of his corps' original commander Major General Shestopalov, reported on 29 July that the strength of his corps had fallen to under 17,000 men after the first two weeks of combat. On 11 July 1941 Colonel P Poluboiarov, from the Northwestern Front armoured directorate, reported that the 12th Mechanized Corps had been in combat for 12 days and had been committed initially in large formations without infantry support or cooperation from artillery and air support. Subsequently, committed in local counter-attacks, it had only '80 worn out tanks and 15 to 17 armoured cars in total in both tank divisions'. Sources & References Further reading Bergstrom, Christer. (2007). Barbarossa – The Air Battle: July – December 1941. Ian Allan Publishing. . Glantz, David. (1998). Stumbling Colossus – The Red Army on the Eve of World War. Kansas. . Glantz, David. (2002). The Battle for Leningrad 1941–1944. Kansas. . Newton, Steven H . (2003). Panzer Operations on the Eastern Front – The Memoirs of General Raus 1941–1945. Da Capo Press. . Mechanized corps of the Soviet Union Military units and formations established in 1941 Military units and formations disestablished in 1959