the mail route had to be relocated south of the trail through Wyoming.

Allied with the Bannock, to whom they were related, the Northern and Western Shoshone fought against the United States in the Snake War from 1864 to 1868. They fought U.S. forces together in 1878 in the Bannock War. By contrast, from 1863 onward, the Eastern Shoshone led by Chief Washakie