The operation began in the early hours of 3 August 1943, with the objective of following up the successful Soviet defensive effort in the Battle of Kursk. The offensive was directed against the German Army Group South's northern flank. By 23 August, the troops of the Voronezh and Steppe Fronts had liberated Kharkov. It was the last time that Kharkov changed hands during the Soviet-German War. The operation led to the retreat of the German forces in Ukraine behind the Dnieper River and set the stage for the Battle of Kiev in autumn 1943.