Native Americans had begun resisting settlement by white Americans before 1812. In 1808 the Shawnee brothers Tecumseh and Tenskwatawa began amassing an intertribal confederacy comprising indigenous groups around the Great Lakes and the Ohio River valley. In 1812 Tecumseh tightened his relationship with Britain, convincing white Americans that the British were inciting unrest among northwestern tribes. British and intertribal forces took Detroit in 1812 and won a number of other victories during the war, but Tecumseh was killed and his confederation was quashed after Detroit was retaken in 1813. Creek tribes continued to resist from 1813 onward, but they were suppressed by Andrew Jackson’s forces in 1814.