What was the name of the 1778 pact that formalized the wartime alliance between France and the United States?

The Treaty of Alliance (1778) formalized the wartime alliance between France and the United States.

The treaty was signed in Paris on February 6, 1778, by American commissioners Benjamin Franklin, Arthur Lee, and Silas Deane, and by Conrad Alexandre Gérard for France. It followed the American victory at Saratoga, which convinced France that the rebellion had a realistic chance of success.

France promised military support if Britain attacked French interests, while the agreement addressed territorial claims and the conditions for ending the war. A companion Treaty of Amity and Commerce established commercial relations and represented France’s formal recognition of the United States.

French assistance proved decisive. French arms and funds supported the Continental Army, and French land and naval forces helped trap the British army at Yorktown in 1781. The alliance was later undermined by changing relations and was formally annulled by the United States in 1798 during tensions with revolutionary France.