What was the conflict between the Us and the Native Americans, and what role did Buffalos play because of this conflict?

The series of conflicts in the western United States between Indians, American settlers, and the United States Army are generally known as the Indian Wars. Many of these conflicts occurred during and after the Civil War until the closing of the frontier in about 1890. The relationship between some Native American tribes and the American buffalo was a sacred one. Not only did it provide the former with food, clothing, and weapons, it also played a central role in their spiritual life.

Explanation:

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immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers