The United States Military Academy (USMA), also known metonymically as West Point or simply as Army, is a United States service academy in West Point, New York. It was originally established as a fort, since it sits on strategic high ground overlooking the Hudson River with a scenic view, 50 miles (80 km) north of New York City. It is the oldest of the five American service academies and educates cadets for commissioning into the United States Army.

The academy was founded in 1802, one year after President Thomas Jefferson directed that plans be set in motion to establish it. It was constructed on site of Fort Clinton on West Point overlooking the Hudson, which Colonial General Benedict Arnold conspired to turn over to the British during the Revolutionary War. The entire central campus is a national landmark and home to scores of historic sites, buildings, and monuments. The majority of the campus's Norman-style buildings are constructed from gray and black granite. The campus is a popular tourist destination, with a visitor center and the oldest museum in the United States Army.

Candidates for admission must apply directly to the academy and receive a nomination, usually from a member of Congress. Other nomination sources include the president and vice president. Students are officers-in-training and are referred to as "cadets" or collectively as the "United States Corps of Cadets" (USCC). The Army fully funds tuition for cadets in exchange for an active duty service obligation upon graduation. About 1,300 cadets enter the academy each July, with about 1,000 cadets graduating.

The academic program grants a Bachelor of Science degree with a curriculum that grades cadets' performance upon a broad academic program, military leadership performance, and mandatory participation in competitive athletics. Cadets are required to adhere to the Cadet Honor Code, which states that "a cadet will not lie, cheat, steal, or tolerate those who do." The academy bases a cadet's leadership experience as a development of all four pillars of performance: academics, character, physical, and military.

Most graduates are commissioned as second lieutenants in the Army. Foreign cadets are commissioned into the armies of their home countries. Since 1959, cadets have also been eligible for an interservice commission in one of the other armed services provided that they meet that service's eligibility standards. A small number of cadets do this.

The academy's traditions have influenced other institutions because of its age and unique mission. It was the first American college to have an accredited civil engineering program and the first to have class rings, and its technical curriculum became a model for engineering schools. West Point's student body has a unique rank structure and lexicon. All cadets reside on campus and dine together en masse on weekdays for lunch. The academy fields 15 men's and nine women's National Collegiate Athletic Association (NCAA) sports teams. Cadets compete in one sport every fall, winter, and spring season at the intramural, club, or intercollegiate level. Its football team was a national power in the early and mid-20th century, winning three national championships. Among the country's public institutions, the academy is the top producer of Marshall and Rhodes scholars. Its alumni and students are collectively referred to as "The Long Gray Line," the former include: U.S. Presidents Dwight D. Eisenhower and Ulysses S. Grant; Jefferson Davis of the Confederacy; Confederate general Robert E. Lee; American poet Edgar Allen Poe; U.S. general George Patton; presidents of Costa Rica, Nicaragua, and the Philippines; and 76 Medal of Honor recipients.

Benedict Arnold (14 January 1741 [O.S. 3 January 1740] – 14 June 1801) was an American military officer who served during the Revolutionary War. He fought with distinction for the American Continental Army and rose 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 had placed him in command of West Point in New York. Arnold was planning to surrender the fort there to British forces, but the plot was discovered in September 1780, whereupon he fled to the British lines. In the later part of the conflict, Arnold was commissioned as a brigadier general in the British Army, and placed in command of the American Legion. He led the British army in battle against the soldiers whom he had once commanded, after which his name became synonymous with treason and betrayal.Arnold was born in Connecticut. In 1775, when the war began, he was a merchant operating ships in the Atlantic Ocean. He joined the growing American army outside of Boston, and distinguished himself by acts that demonstrated intelligence and bravery: In 1775, he captured Fort Ticonderoga. In 1776, he deployed defensive and delay tactics at the Battle of Valcour Island in Lake Champlain that gave American forces time to prepare New York's defenses. His performance in the Battle of Ridgefield in Connecticut prompted his promotion to major general. He performed operations that provided the Americans with relief during the Siege of Fort Stanwix, and key actions during the pivotal 1777 Battles of Saratoga, in which he suffered leg injuries that put him out of combat career for several years.

Arnold repeatedly claimed that he was being passed over for promotion by the Continental Congress, and that other officers were being given credit for some of his accomplishments. Some among those in his military and political circles charged him with corruption and other bad acts. After formal inquiries, he was usually acquitted, but Congress investigated his finances and determined that he was indebted to Congress, and that he had borrowed money heavily to maintain a lavish lifestyle.

Arnold mingled with Loyalist sympathizers in Philadelphia and married into a Loyalist family when he wedded Peggy Shippen. She was a close friend of British major John André and kept in contact with him when he became head of the British espionage system in New York. Many historians see her as having facilitated Arnold's plans to switch sides; he opened secret negotiations with her friend André, and she relayed their messages to each other. The British promised £20,000 for the capture of West Point, a major American stronghold; Washington greatly admired Arnold and gave him command of that fort in July 1780. His scheme was to surrender the fort to the British, but it was exposed in September 1780 when Patriot militia captured André carrying papers which revealed the plot. Arnold escaped; André was hanged.

Arnold received a commission as a brigadier general in the British Army, an annual pension of £360, and a lump sum of over £6,000. He led British forces in the Raid of Richmond and nearby areas, and they burned much of New London, Connecticut, to the ground and slaughtered surrendering forces after the Battle of Groton Heights—just a few miles downriver from the town where he had grown up. In the winter of 1782, he and Peggy moved to London, England. He was well received by King George III and the Tories but frowned upon by the Whigs and most Army officers. In 1787, he moved to Canada to a merchant business with his sons Richard and Henry. He was extremely unpopular there and returned to London permanently in 1791, where he died ten years later.