The Battle of Tippecanoe was fought on November 7, 1811, in Battle Ground, Indiana, between American forces led by then Governor William Henry Harrison of the Indiana Territory and tribal forces associated with Shawnee leader Tecumseh and his brother Tenskwatawa, leaders of a confederacy of various tribes who opposed European-American settlement of the American frontier. As tensions and violence increased, Governor Harrison marched with an army of about 1,000 men to attack the confederacy's headquarters at Prophetstown, near the confluence of the Tippecanoe River and the Wabash River.