The Bannock War of 1878 arose from longstanding tensions between the Bannock and Paiute peoples and the U.S. government. The Bannock nation, which had developed as a distinct group from the Northern Paiute nation of northern Idaho, numbered between 600 and 800 in 1870. This armed conflict erupted in June 1878 and represented a significant moment of resistance by Native American forces against U.S. military expansion and control in the Pacific Northwest.
The conflict was commanded on the U.S. side by Brigadier General Oliver Otis Howard, who led forces consisting of the 21st Infantry Regiment and volunteers. The Bannock and Paiute warriors were initially led by Chief Buffalo Horn, who was killed in action on June 8, 1878. Following Buffalo Horn's death, Chief Egan assumed leadership of the Bannock forces. The conflict saw significant military engagement, including a notable incident in July when Chief Egan and some of his warriors were killed by a Umatilla party that entered his camp through subterfuge. Nearby states also sent militias to support the U.S. military effort in the region.
The war concluded in August and September 1878 when the remaining scattered Bannock-Paiute forces surrendered, with many returning to Fort Hall Reservation. The U.S. Army subsequently interned approximately 543 Paiute from Nevada and Oregon and Bannock prisoners at the Yakama Indian Reservation in southeastern Washington Territory. This outcome reflected the broader pattern of U.S. military dominance and the forced relocation of Native American populations during the Indian Wars period.
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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