Marshal Jean-Baptiste Donatien de Vimeur, comte de Rochambeau (1 July 1725 – 10 May 1807) was a French nobleman and general whose army played a critical role in helping the United States defeat the British Army at Yorktown in 1781 during the American Revolutionary War. He was commander-in-chief of the French expeditionary force sent by France to help the American Continental Army fight against British forces. Source: Wikipedia (en)