that the 21st Mechanized Corps had been committed initially in large formations without cooperation from Artillery and Air Support. It had only '25 Kv-1s, 10 T-26s, 4 Bt 7s and 2 T-34s remaining and 'is no longer a mechanized formation. Its motorized infantry are most often simple infantry reinforced by a few tanks. On 23 July 1941 Major General Lelyushenko reported that the 21st Mechanized Corps had suffered 6,284 casualties, or 60% of its combat strength during the first month of combat. References Further reading Mechanized corps of the Soviet Union Military units and formations established in 1941 Military units and formations disestablished in 1941