The Battle of Kursk had begun on 5 July and most Germans, particularly Hitler, had been expecting to win—in part because of the massive force of tanks they had assembled. These included the new Panthers and Tigers.
Within days, it became clear that the battle could end in failure. The German panzer force was suffering irreparable losses but still failing to advance deeply enough into Soviet territory. Despite the continued optimism of von Manstein, whose troops had been performing well, Hitler called an end to the offensive. He was already worried by the recent Allied invasion of Sicily and was intent on moving troops from the Eastern Front to Italy.