 Grechko's first command during the second world war was of the 34th Cavalry Division, which put up a valiant fight around Kremenchug (near Kiev) in the Ukraine.On 15 January 1942, Grechko was put in command of the entire V Cavalry Corps.Starting 15 April 1942 and lasting until 16 October 1943, Grechko was placed in command of 12th Army, 47th Army, 18th Army, and 56th Army.