Begin reading with the Indian Apppropriations Act.
http://en.wikipedia.org/wiki/Native_Americans_in_the_United_States#American_expansion_justification
How did the incorporation of western territories into the United States affect Indian nations such as the Sioux or the Nez Pierce?
3 answers
is this an appropritate answer?
-The Sioux people were among the largest most adaptive of all Indian nations. Buffalo played a major role into their culture. Buffalo hide meant food and clothing for this tribe and many other needs as well. Therefore, the slaughter of buffalo provoked a crisis for the Sioux people. Essentially their way of life was undermined and their food sources were practically destroyed. The ones slaughtering the buffalo, were trying to break tribal resistance to the reservation system, and they did leaving the Sioux and many other tribes concluding that they could only fight or die. It is important that issues like this did not only affect Sioux, it happened to all Indian nations as a result of many treaties signed forcing removal of tribes.
-The Sioux people were among the largest most adaptive of all Indian nations. Buffalo played a major role into their culture. Buffalo hide meant food and clothing for this tribe and many other needs as well. Therefore, the slaughter of buffalo provoked a crisis for the Sioux people. Essentially their way of life was undermined and their food sources were practically destroyed. The ones slaughtering the buffalo, were trying to break tribal resistance to the reservation system, and they did leaving the Sioux and many other tribes concluding that they could only fight or die. It is important that issues like this did not only affect Sioux, it happened to all Indian nations as a result of many treaties signed forcing removal of tribes.
That explains more about the effects of settlers in Indian lands than the effects of the territories being incorporated into the U.S.