N'ihe dị ka afọ 1878, ndị Northern Arapaho biri na Eastern Shoshone na Wind River Reservation na Wyoming ma bụrụ ndị gọọmentị kwadoro dị ka Arapahoe Tribe nke Wind River Reservation. Ndị Southern Arapaho bi na Southern Cheyenne na Oklahoma. Ọnụ, ndị otu ha debara aha ha dị ka Cheyenne na Arapaho Tribes. Ajụjụ: Afọ iri ka ndị Arapaho kewara?
afọ ndị 1850