 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.All of these units were part of the North Caucasus Front, and Grechko led them all with distinction.In October 1943, Grechko was promoted to Deputy Commander-in-Chief of 1st Ukrainian Front.