One of the main reasons why the settlers had poor relations with the Native Americans was because "<span>B) They wanted to force them to move off of their land," since more and more settlers came from Europe--requiring more land. </span>
A.) more factories and money
The North and the South had pretty equal army sizes during the war. The North had a big industrial industry during this time. The Confederacy had 1/9 of industrial capacity compared to the North at the start of the war.
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Maurya Empire and Gupta Empire are the most significant but there has been more than that.
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It would be cooler underground