The treaty that formally recognized the independence of the United States from Britain was the Treaty of Paris, signed in 1783. This agreement concluded the American Revolutionary War and established the boundaries of the new nation. The treaty affirmed the recognition of American sovereignty and granted significant territory to the United States, including lands north of the Ohio River and west to the Mississippi. It was a pivotal moment in history as it set the stage for the future expansion of the United States and signaled the decline of British colonial power.