The 1876 Battle of the Little Bighorn occurred within the context of the Great Sioux War of 1876, which was itself rooted in decades of conflict over territorial claims and resource access. Most battles in the Great Sioux War, including the Battle of the Little Bighorn, took place on lands that native tribes had taken from other tribes since 1851. The Lakota Sioux, Northern Cheyenne, and Arapaho tribes were encamped along the Little Bighorn River in what was the Crow Indian Reservation in southeastern Montana Territory, an area to which they had no treaty claim. The Crow tribe, the indigenous holders of treaty rights to the region, had long sought U.S. military intervention against these native intruders. The underlying causes of the conflict included the steady displacement of the Lakota by the United States around Fort Laramie and white encroachment into the Black Hills, which the Lakota considered sacred. The battle took place on June 25–26, 1876, between combined forces of the Lakota Sioux, Northern Cheyenne, and Arapaho tribes and the 7th Cavalry Regiment of the United States Army. The engagement, known to the Lakota and other Plains Indians as the Battle of the Greasy Grass and to Americans as Custer's Last Stand, resulted in a significant defeat for U.S. forces. This military outcome represented the most significant action of the Great Sioux War of 1876, demonstrating the formidable military capability of the combined tribal forces when unified against the American military presence.
The Indian Wars encompass more than three centuries of armed conflict between the United States government, American settlers, and Indigenous nations — from the Powhatan Wars of the 1620s through the final Plains campaigns of the late 19th century. The eastern conflicts — King Philip's War (1675–1676), the Tuscarora War (1711–1715), and the Creek and Seminole Wars — largely ended organized Indigenous resistance east of the Mississippi by the 1840s. On the Great Plains, the Sioux Wars (1854–1890), Red River War (1874–1875), and Nez Perce War (1877) followed the displacement wrought by the transcontinental railroad and the near-extinction of the American bison — an estimated 30 to 60 million animals reduced to fewer than 1,000 by 1890. The Ghost Dance religious movement and the massacre at Wounded Knee (December 29, 1890), in which US cavalry killed approximately 250 Lakota men, women, and children, marked the effective end of armed resistance. The Dawes Act (1887) allotted reservation land to individual families, opening millions of acres to white settlement and reducing Indigenous landholdings by about two-thirds over the following decades.
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