The Battle of Liegnitz on 15 August 1760 saw Frederick the Great's Prussian Army defeat the Austrian army under Ernst von Laudon. The armies collided around the Prussian Silesian city of Liegnitz (Legnica). Frederick split his army in two, one part commanded by Field Marshal Zieten. Frederick heard the sound of skirmishing and thought Zieten was already fighting. He sent ten grenadiers' battalions out of the woods to assist an attack that wasn't happening. 5,000 were cut down in 30 minutes.