Воронежский фронт
Operation Polkovodets Rumyantsev was intended as the main Soviet offensive for 1943. Its aim was to destroy the 4th Panzer Army and Army Detachment Kempf, and cut off the extended southern portion of Army Group South. After the heavy losses sustained by the Voronezh Front, during Operation Citadel, the Soviets needed time to regroup and refit, delaying the start of the offensive until 3 August. Diversionary attacks, launched two weeks earlier across the Donets and Mius Rivers into the Donbass, drew the attention of German reserves and thinned the defending forces that would face the main blow. The offensive was initiated by the Voronezh Front and Steppe Fronts against the northern wing of Army Group South. They drove through the German positions, making broad and deep penetrations. By 5 August, the Soviets had liberated Belgorod.