Native American policy was set by the national government (the states had very little role), and after 1865 the national policy was that Native Americans either had to assimilate into the larger community or remain on reservations, where the government provided subsidies. Reservation natives were no longer allowed to roam or fight their traditional enemies. The U.S. Army was to enforce the laws. Natives of the West came in conflict with expansion by miners, ranchers and settlers. By 1880, the buffalo herds, a foundation for the hunting economy had disappeared. Violence petered out in the 1880s and practically ceased after 1890.