 Unhappy with their treatment since the peace treaty of 1795, native tribes led by the Shawnee Chief Tecumseh and his brother Tenskwatawa formed a coalition against the Americans.Tecumseh's War started in 1811, when General Harrison led an army to rebuff the aggressive movements of Tecumseh's pan-Indian confederation.The Battle of Tippecanoe (1811), which caused a setback for the Native Americans, earned Harrison national fame and the nickname of "Old Tippecanoe".