@Blickers,
Still, Anglos had the concept that a chief had the authority to commit an entire tribe to an agreement. Most tribes didn't even have the concept of 'chief', so when some tribal members didn't follow agreements made by the persons we were dealing with, Anglos felt the treaties had been broken.
Anglo is a local term in NW New Mexico only meaning northern European ancestry. My town, for example, is about equal parts Native American (Navajo mostly), Anglo, and Latino.