I think it was land ownership. As many Americans made the push to the West,
it angered the Native Americans living there because they were not encroaching
on their land but were taking it away from them. This of course led to conflict that killed
many Native Americans
The Tripartite Agreement served as a warning toward the United States.
This is known in history as the Civil Rights Act of 1866 where a coalition was formed by both moderate and radical republicans. In such act, it made African Americans citizens of the United States of America, including the total elimination of discrimination against African Americans.
The Magma Cart was written first