The Scarlet Coat (1955)

During the Revolutionary War, American General Benedict Arnold (Robert Douglas) conspires to abandon his defenses at West Point to the British for a large cash payout. Maj. John Boulton (Cornel Wilde) is tasked to undertake a counter-intelligence operation to stop the deal from going through. Getting in his way is his opposite, redcoat Maj. John Andre (Michael Wilding), along with Sally Cameron (Anne Francis), an attractive woman with questionable loyalties.