All cooperated with one another on the friendliest of terms. All had, almost invariably, the same interests at heart. They hunted and raided together on an informal, ad hoc basis, and frequently swapped members. They never fought one another.33 They always had common interests, common enemies, and in spite of their decentralization acted with remarkable consistency when it came to diplomacy and trade. (Other tribes had band structures that were even harder for whites to understand. Sitting Bull, for example, was a member of the Sioux tribe, but his affiliation was with the Lakota, or western
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