John André – Wikipedia

Major John André (May 2, 1750 – October 2, 1780) was a British Army officer who served as the head of Britain’s intelligence operations during the American War for Independence. In September 1780, André negotiated with Continental Army general Benedict Arnold, who secretly offered to turn over control of the American fort at West Point, New York to the British. Due to a series of mishaps …

https://en.m.wikipedia.org/wiki/John_Andr%C3%A9