The Battle of the Chesapeake, also known as the Battle of the Virginia Capes or simply the Battle of the Capes, was a crucial naval battle in the American War of Independence that took place near the mouth of Chesapeake Bay on 5 September 1781, between a British fleet led by Rear Admiral Sir Thomas Graves and a French fleet led by Rear Admiral Francois Joseph Paul, the Comte de Grasse. The battle was tactically inconclusive but strategically a major defeat for the British, since it prevented the Royal Navy from reinforcing or evacuating the blockaded forces of Lieutenant General Lord Cornwallis at Yorktown, Virginia.