What general from the American Revolutionary War's activities were reported by Marquis de Lafayette?
James Armistead Lafayette:  As a double agent, he was responsible for reporting the activities of Benedict Arnold – after he had defected to the British – and Lord Cornwallis during the run-up to the Battle of Yorktown. Benedict Arnold: Benedict Arnold (January 14, 1741 [O.S. January 3, 1740] June 14, 1801) was a general during the American Revolutionary War, who fought for the American Continental Army, and later defected to the British Army.
Benedict Arnold