The Treaty of Alliance, also known as the Franco-American Treaty, was a defensive alliance between the Kingdom of France and the United States formed amid the American Revolutionary War with Great Britain. It was signed by delegates of King Louis XVI and the Second Continental Congress in Paris on February 6, 1778, along with the Treaty of Amity and Commerce and a secret clause providing for the entry of other European allies; together these instruments are sometimes known as the Franco-American Alliance or the Treaties of Alliance. The agreements marked the official entry of the United States on the world stage, and formalized French recognition and support of U.S. independence that was to be decisive in America's victory.

The American Revolutionary War, also known as the Revolutionary War or American War of Independence, was a military conflict that was part of the broader American Revolution, where American Patriot forces organized as the Continental Army and commanded by George Washington defeated the British Army.