Battle of Kursk

On 5 July 1943, Germany attacked Soviet forces around the Kursk Bulge. Within a week, German forces had exhausted themselves against the Soviets' deeply echeloned and well-constructed defenses, and for the first time in the war Hitler cancelled the operation before it had achieved tactical or operational success. The battle ended on 23 August 1943. Soviets regain territory along a 2,000 km (1,200 mi) wide front after the battle.