Benedict Arnold was an American military officer who served during the Revolutionary War. He fought with distinction for the American Continental Army, rising to the rank of major general, before defecting to the British side of the conflict in 1780. General George Washington had given him his fullest trust and placed him in command of West Point, New York. Arnold planned to surrender the fort to British forces, but the plot was discovered in September 1780 and he fled to the British lines. Arnold received a commission as a brigadier general in the British Army, commanding the American Legion in the later part of the conflict. Arnold's name quickly became a byword in the United States for treason and betrayal because he led the British army in battle against the very men whom he had once commanded.
Arnold was born in Connecticut and was a merchant operating ships on the Atlantic Ocean when the war began in 1775. He joined the growing army outside Boston and distinguished himself through acts of intelligence and bravery.