The siege of Yorktown, also known as the Battle of Yorktown and the surrender at Yorktown, began September 28, 1781, and ended on October 19, 1781, at exactly 10:30 am in Yorktown, Virginia. It was a decisive victory by a combined force of the American Continental Army troops led by General George Washington with support from the Marquis de Lafayette and French Army troops led by the Comte de Rochambeau and a French naval force commanded by the Comte de Grasse over the British Army commanded by British Lieutenant General Charles Cornwallis.