Loss of Buffalo
Loss of buffalo, treaties, more guns and weapons needed, the fact that the Indians were outnumbered and the transcontinental railroads are 5 reasons about what brought about the defeat of the plains Indians. The loss of buffalo was a major thing that caused it because buffalo is practically what the Indians lived on. Basically the killing of he buffalo was an end to Indian Independence because without it there is no way for them to live. Buffalo is what they ate, what they got their hunting skills from, and what they made their clothes from.