Tecumseh's Confederacy was a group of Native Americans in the Old Northwest that began to form in the early 19th century around the teaching of Tenskwatawa (The Prophet).
The confederation grew over several years and came to include several thousand warriors. Shawnee leader Tecumseh, the brother of The Prophet, developed into the leader of the group as early as 1808.
Deemed a threat to the United States, a preemptive strike against the confederation was launched resulting in the 1811 Battle of Tippecanoe. Under Tecumseh's leadership, the confederation went to war with the United States during Tecumseh's War and the War of 1812.
Following the death of Tecumseh in 1813 the confederation fell apart.