The initial plans for Germany's 1942 summer offensive, code-named "Operation Blue" called for four sequential operations. The first, Blue I, featured the Four Panzer Army, German Second Army, and German Sixth Army all working together to encircle and destroy Soviet forces before the city of Voronezh along the upper Don River. The second part of the campaign, Blue II, called for the German Sixth Army to turn south in hopes of engineering a planned encirclement at Millerovo on the Donets River.
Early in 1943 the Red Army had launched a series of massive offensives across the breadth of the German Eastern Front. In particular, and as the German Sixth Army fought to its destruction at Stalingrad, multiple Soviet fronts, spearheaded by General N.F. Vatutin's Southwestern Front, surged across southern Russia. Meanwhile, Erich von Manstein, commanding the whole of the reconstituted German Army Group South, the former Army Groups A, B and Don, fell back before the Soviet advance and regrouped his armies.
Soviet General Cherniakhovsky’s 60th Army, part of Golikov’s Voronezh Front, took
