Answer:
The main impact that I can think of with regard to this question is that the Civil War helped to cause conflicts between Indians and the United States. The Civil War, of course, took up a lot of government resources. Because of this, Native Americans in the Midwest weren't paid the way the treaties said they had to be.
The Immigration Act of 1924 produced highly discriminatory results because it set a max on how many immigrants could come to the US depending on what country they came from.
For example, there were many more opportunities for citizens from countries like Germany, Great Britain, and Sweden in comparison to individuals from Italy or Russia. Here are some numbers to support this claim:
Germany's Quota (aka amount that could come into US)- 51,227
Great Britain and Northern Ireland's Quota- 34,0007
Sweden's Quota- 9,561
Italy's Quota- 3,845
Russia's Quota-2, 248.
C.) The government's decision to raise taxes to pay its huge debts
