Crazy Horse (Lakota: Tȟašúŋke Witkó [tˣaˈʃʊ̃kɛ witˈkɔ], lit. 'His-Horse-Is-Crazy'; c. 1840 – September 5, 1877) was a Lakota war leader of the Oglala band and one of the most renowned Native American figures of the nineteenth century.