Crazy Horse was a Lakota war leader of the Oglala band in the 19th century. He took up arms against the United States federal government to fight against encroachment by White American settlers on Native American territory and to preserve the traditional way of life of the Lakota people. His participation in several famous battles of the Black Hills War on the northern Great Plains, among them the Fetterman Fight in 1866, in which he acted as a decoy, and the Battle of the Little Bighorn in 1876, in which he led a war party to victory, earned him great respect from both his enemies and his own people.

The Lakota are a Native American people. Also known as the Teton Sioux, they are one of the three prominent subcultures of the Sioux people, with the Eastern Dakota (Santee) and Western Dakota (Wičhíyena). Their current lands are in North and South Dakota. They speak Lakȟótiyapi—the Lakota language, the westernmost of three closely related languages that belong to the Siouan language family.