The Battle of Paoli (also known as the Battle of Paoli Tavern or the Paoli Massacre) was a battle in the Philadelphia campaign of the American Revolutionary War fought on September 20, 1777, in the area surrounding present-day Malvern, Pennsylvania. Following the American retreats at the Battle of Brandywine and the Battle of the Clouds, George Washington left a force under Brigadier General Anthony Wayne behind to monitor and harass the British as they prepared to move on the revolutionary capital of Philadelphia. On the evening of September 20, British forces under Major General Charles Grey led a surprise attack on Wayne's encampment near the Paoli Tavern. Although there were relatively few American casualties, claims were made that the British took no prisoners and granted no quarter, and the engagement became known as the "Paoli Massacre."