B Northern Europe most immigrants came from Europe
Answer:There were two reasons why the treaty system was abandoned. 1. First, white settlers needed more and more land, and the fact that tribes were treated as separate nations with separate citizens made it more difficult to take land from them and "assimilate" them into the general population.
Explanation:
sorry i was to lazy to give you a more understanding answer
Answer:
he believed it was about preserving the Union