Benedict Arnold V (January 14, 1741 – June 14, 1801) was a general during the American Revolutionary War who originally fought for the American Continental Army but switched sides to the British Empire. While he was still a general on the American side, he obtained command of the fort at West Point, New York, and plotted unsuccessfully to surrender it to the British. After the plot failed, he served in the British military.

He distinguished himself early in the war through acts of cunning and bravery. His many successful actions included the Capture of Fort Ticonderoga in 1775, successful defensive and delaying tactics while losing the Battle of Valcour Island on Lake Champlain in 1776, the Battle of Ridgefield, Connecticut (after which he was promoted to Major General), and the pivotal Battles of Saratoga in 1777, in which he suffered leg injuries that effectively ended his combat career for several years.

In spite of his success, Arnold was passed over for promotion by the Continental Congress while other general officers took credit for his many accomplishments. Charges of corruption were brought by political adversaries, and Congress investigated his accounts, finding he owed it money after he had spent much of his own money on the war effort. Frustrated, bitter, and strongly opposed to the new American alliance with France, Arnold decided to change sides in 1779. In July 1780, he sought and obtained command of West Point in order to surrender it to the British. Arnold's scheme was exposed when American forces captured British Major John André carrying papers that revealed the plot. Upon learning of André's capture, Benedict Arnold escaped down the Hudson River to the British sloop-of-war Vulture, narrowly avoiding capture by the forces of General Washington, who was arriving the same day to inspect West Point and to meet and dine with Arnold.