The Western Confederacy, also known as Western Indian Confederacy, was a loose confederacy of North American Natives in the Great Lakes region following the American Revolutionary War. The confederacy, which had its roots in pan-tribal movements dating to the 1740s, came together in an attempt to resist the expansion of the United States into the Northwest Territory after Great Britain ceded the region to the United States in the Peace of Paris (1783). The resistance resulted in the Northwest Indian War (1785–1795), which ended with the U.S. victory at the Battle of Fallen Timbers.
Although many of the native peoples had fought in the war as British allies, Great Britain made no mention of their allies in the Treaty of Paris. According to Joseph Brant, a Mohawk chief who was one of the early architects of the confederacy, the British had "sold the Indians to Congress." The confederacy first came together in 1786 at a conference at the Wyandot town of Upper Sandusky, with the intention of forming a common front in dealing with the Americans.
Members of many different American Indian tribes were involved in the Western Confederacy. The confederacy was sometimes known as the "Miami Confederacy" because U.S. officials overestimated the influence and numerical strength of the Miami tribe within the confederation.