The document that officially ended the American Revolutionary War was the Treaty of Paris, signed on September 3, 1783. Negotiated by American representatives Benjamin Franklin, John Adams, and John Jay, the treaty recognized the independence of the United States and established boundaries for the new nation. It granted significant territorial concessions to the U.S., including land east of the Mississippi River. The Treaty of Paris also addressed issues like fishing rights and the return of property and prisoners. Its signing marked a crucial moment in establishing the framework for American governance and international relations post-revolution.