ブラウ作戦
On 28 June 1942 the Axis began their major summer offensive, Case Blue. Army Group South's objective was to advance towards the Stalingrad and Caucasus regions. Now commanding "Luftflotte 4", Generaloberst Richthofen had one of the largest commands supporting the effort. The Luftwaffe concentrated its largest single force since "Barbarossa". Of the 2,690 aircraft supporting Case Blue, 52 per cent (1,400) were under the command of Richthofen. A further 265 Romanian, Hungarian, Italian and Slovak aircraft were also present. Opposing them were 2,800 aircraft (900 in reserve) including 1,200 fighters of the southern VVS front. To the north, the Soviets had been convinced the main attack was to come against Moscow owing to the German deception plan Operation Kremlin.