What was the final blow to native american tribal life on the plains?

White people who slaughtered the buffallo like there was an unlimited supply.

Explanation:

The reason why the Battle of Palo Duro Canyon was considered a final blow to the Texas Plains Indians in the Red River Waris because the Plains Indians had no more supplies with which to survive the coming winter.

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

1st amendment: freedom of speech, religion, petition, press, and assembly

2nd: right to bear arms

3rd: quartering of soldiers

4th: search and seizure