<span>The primary reason why the US had become so
incredibly divided to the point of no return by 1860 was because the US
had expanded its territory so dramatically, and it had to be determined
whether each new state was to be slave or free--practically dividing the
nation in two. </span>
Answer:
They divided the states into different time zones.
Explanation:
As trains left to go to locations, it would be later or earlier depending on which direction they went, so take for example a train going from New York to Seattle. It would probably be a couple ahead of New York.
The American's new diseases, the Americans in general, and the want of the Native American's resources.
