Answer:
(See explanation for further details)
Explanation:
Since those cities were communication nodes that eased the expansion of the United States of America to the west, where railway, finnancial and mail services were developed very rapidly and at a gigantic scale, requiring great numbers of workforce.
The resulting outcry across the United States led to a number of antiwar demonstrations—it was at one of these demonstrations that the National Guard shot four protesters at Kent State.
Because the North wanted to abolish slavery and the South didn't because they were making some serious money.
