The Battle of Wolf Mountain (also known as the Battle of the Wolf Mountains, Miles's Battle on the Tongue River, the Battle of the Butte, Where Big Crow Walked Back and Forth, and called the Battle of Belly Butte by the Northern Cheyenne) was a battle fought on January 8, 1877, by soldiers of the United States Army against Lakota Sioux and Northern Cheyenne warriors during the Great Sioux War of 1876. The battle was fought in southern Montana Territory, about four miles southwest of modern-day Birney, Montana, along the Tongue River.In 2001, the Wolf Mountains Battlefield was listed on the National Register of Historic Places, and was raised to the status of National Historic Landmark in 2008.

Crazy Horse (Lakota: Tȟašúŋke Witkó, IPA: [tχaˈʃʊ̃kɛ witˈkɔ], lit. ''His-Horse-Is-Crazy''; c. 1840 – September 5, 1877) 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.

In September 1877, four months after surrendering to U.S. troops under General George Crook, Crazy Horse was fatally wounded by a bayonet-wielding military guard while allegedly resisting imprisonment at Camp Robinson in present-day Nebraska. He ranks among the most notable and iconic of Native American warriors and was honored by the U.S. Postal Service in 1982 with a 13¢ Great Americans series postage stamp.