Question: Jean-Joseph Sourbader de Gimat was part of a war in Yorktown Virginia with American and French allies that ended on what date?
Sentence (from "Siege of Yorktown"): The culmination of the Yorktown campaign, the siege proved to be the last major land battle of the American Revolutionary War in the North American theater, as the surrender by Cornwallis, and the capture of both him and his army, prompted the British government to negotiate an end to the conflict.
Relevant evidence: No