Entitled: "Attack by the Umatilla Indians upon hostile snakes, July 2d. The Umatilla chief calling his braves together by the looking-glass signal, sketched by an army officer. The Bannock War of 1878 was an armed conflict between the US military and Bannock and Paiute warriors lasting from June to August 1878. The Bannock-Paiute totaled about 500 warriors; led by Chief Buffalo Horn who was killed in action in June. After his death, Chief Egan led the Bannock. He and some of his warriors were killed in July, by an Umatilla party who entered his camp in subterfuge. The US military, consisting of the 21st Infantry Regiment and volunteers, was led by Brigadier General Oliver Howard. Nearby states also sent militias to the region. The conflict ended in August and September 1878, when the remaining scattered Bannock-Paiute forces surrendered; many returned to Fort Hall Reservation. The US Army forced some 543 Paiute, from Nevada and Oregon, and Bannock prisoners to be interned at Yakama Indian Reservation in southeastern Washington Territory. Frank Leslie's Illustrated Newspaper, July 27, 1878.