 Nyorai kupfuurira kweiyi ndima - Muna 1942, Army Group South yaifanira kutungamirira kurwisa kwechiGermany kwezhizha muRussia kunozivikanwa seCase Blue. Mauto e17 aifanira kupa dziviriro yeflank ku1st Panzer Army sezvo yakarova yakananga kuRwizi rweDon. Kubva muna June kusvika muna July, Mauto e17 eGermany, Italian Expeditionary Corps muRussia, uye mauto e3 eRomania akarongwa se Army Group Ruoff. Muna August 1942, Hitler akakamura Army Group South kuva mapoka maviri matsva emauto: Army Group A uye Army Group B. Army Group A yaisanganisira 17th Army, 1st Panzer Army, uye 4th Panzer Army. Boka remauto B raisanganisira 2nd Army, 6th Army, Italian 8th Army, uye Hungarian 2nd Army. Pakazosvika Gumiguru 1942, mauto e3rd Romanian ne4th Romanian akawedzerwa kuti awedzere kusimbisa Army Group B. 