The Siege of Yorktown, also known as the Battle of Yorktown and the surrender at Yorktown, took place in 1781 and was the final major land engagement of the American Revolutionary War. It was won decisively by the Continental Army, led by George Washington, with support from the Marquis de Lafayette and French Army troops, led by Comte de Rochambeau, and a French Navy force commanded by the Comte de Grasse, defeating the British Army commanded by British Lieutenant General Charles Cornwallis.