The battle was fought in the town of Leuthen (now Lutynia, Poland), 10 km (6 mi) northwest of Breslau, (now Wrocław, Poland), in Prussian (formerly Austrian) Silesia. By exploiting the training of his troops and his superior knowledge of the terrain, Frederick created a diversion at one end of the battlefield and moved most of his small army behind a series of low hillocks. The surprise attack in oblique order on the unsuspecting Austrian flank baffled Prince Charles, who took several hours to realize that the main action was to his left, not his right. Within seven hours, the Prussians had destroyed the Austrians and erased any advantage that the Austrians had gained throughout the campaigning in the preceding summer and autumn. Within 48 hours, Frederick had laid siege to Breslau, which resulted in the city's surrender on 19–20 December.