I thought of this one time, it was pretty much Arnold does go over to the British, and gets found out like he does, but the British learn of the plan to take West Point even though Andre is captured. So the British move out cause it sounds like a cake walk, and Arnold wanting to get to either the British or his hands on Andre, suddenly finds his force fighting the British in the rear and causing a weak victory, but one that forces the British to move around in a long flank leaving back to New York.
The entire battle is a misunderstanding, but Arnold is painted as this great military genius who tricked the British. Many with in congress argue that Arnold just got lucky after being found out, but Washington personally defends Arnold.