Jean-Baptiste Donatien de Vimeur, comte de Rochambeau
Marshal Jean-Baptiste Donatien de Vimeur , comte de Rochambeau ( ; 1 July 1725 – 10 May 1807 ) was a French nobleman and general whose army played the decisive role in helping the United States defeat the British army at Yorktown in 1781 during the American Revolution . 
<triplet> Jean-Baptiste Donatien de Vimeur, comte de Rochambeau <subj> 1 July 1725 <obj> date of birth <subj> 10 May 1807 <obj> date of death <triplet> Yorktown <subj> 1781 <obj> point in time