Prospectors Among the Blackfeet by Howard Terpning ~ Blackfeet warriors find evidence of intrusion by white men: a prospector’s gold pan and other debris carelessly left behind in a shallow stream. The Blackfeet were among the most implacable in their enmity toward white trespassers, first the beaver trappers and later the prospectors. For good reason they had only to look at their neighbors. Finding gold in the treaty-protected Black Hills led to the final crushing military campaigns against the Sioux and Cheyenne and the defeat of Custer at Little Big Horn.