Tecumseh was born in what is now Ohio at a time when the far-flung Shawnees were reuniting in their Ohio Country homeland. During his childhood, the Shawnees lost territory to the expanding American colonies in a series of border conflicts. Tecumseh's father was killed in battle against American colonists in 1774. Tecumseh was thereafter mentored by his older brother Cheeseekau, a noted war chief who died fighting Americans in 1792. As a young war leader, Tecumseh joined Shawnee Chief Blue Jacket's armed struggle against further American encroachment, which ended in defeat at the Battle of Fallen Timbers in 1794 and the loss of most of Ohio in the 1795 Treaty of Greenville.