The Siege of Dresden took place in July 1760 during the Seven Years' War when a Prussian force led by Frederick the Great unsuccessfully besieged the city of Dresden in Saxony. Frederick had previously occupied Dresden in 1756 during his Invasion of Saxony, which had triggered the outbreak of war. In 1759 it had been taken back by Austria-led forces. Frederick now targeted it in an attempt to reassert control over Saxony where he had expansionist territorial ambitions.