American Horse (Oglala Lakota: "Wašíčuŋ Tȟašúŋke" in Standard Lakota Orthography) (a/k/a "American Horse the Elder") (1830–September 9, 1876) was an Oglala Lakota warrior chief renowned for courage and honor. American Horse is notable in American history as one of the principal war chiefs allied with Crazy Horse during Red Cloud's War (1866–1868) and the Battle of the Little Bighorn during the Great Sioux War of 1876-1877. Chief American Horse was a son of Old Chief Smoke, an Oglala Lakota head chief and one of the last great Shirt Wearers, a highly prestigious Lakota warrior society. He was a signatory to the Fort Laramie Treaty of 1868, along with his brothers Chief Red Cloud and Chief Blue Horse. A month or so after the Treaty, American Horse was chosen a "Ogle Tanka Un" (Shirt Wearer, or war leader) along with Crazy Horse, Young-Man-Afraid-of-His-Horses and Man That Owns a Sword. On September 9, 1876, American Horse was mortally wounded in the Battle of Slim Buttes fighting to protect his family and defending against the white invasion of the "Paha Sapa" Black Hills.