SAT Subject US History Practice Question 525: Answer and Explanation
56. During the 1860s and 1870s federal troops repeat edly clashed with Native Americans in which of the following regions?
B. Great Lakes
D. Mississippi Valley
E. Great Plains
Correct Answer: E
The other areas of the nation were already settled, and Native Americans had been driven out or agreements had been made with them. The clashes in the Great Plains occurred while those areas were being settled during the 1860s and 1870s.