Ro·cham·beau 
(rō′shăm-bō, -shäɴ-), Comte de Title of Jean Baptiste Donatien de Vimeur. 1725-1807.
(rō′shăm-bō, -shäɴ-), Comte de Title of Jean Baptiste Donatien de Vimeur. 1725-1807. French army officer who commanded French forces in the American Revolution, most notably in the defeat of the British at Yorktown (1781).