Whereas in 1941 most units fought on the central front supporting Army Group Centre , 1,610 aircraft ( 61 % ) , supported Army Group South .
German air strength in the east numbered 2,644 aircraft on 20 June 1942 , over 20 % more than a month earlier .
In 1941 most units fought on the central front supporting Army Group Centre , 1,610 aircraft ( 61 % ) , supported Army Group South .
German air strength in the east numbered 2,644 aircraft on 20 June 1942 , over 20 % more than a month earlier .