In 1865, in part due to their long rivalry with the Sioux, 95 Pawnee men joined enlisted with the United States military for the Powder River War, a military campaign against the Sioux, Arapaho, and Cheyenne intended to intimidate the tribes. The Pawnee scouts also worked with the Union Pacific Railroad to protect railroad workers during the construction of the transcontinental railroad through Nebraska and Wyoming. These actions by the Pawnee scouts did not improve relations between the Pawnee and Sioux.
