How did the creation of transcontinental railroads benefit the united states

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

i think the answer is: cuba wanted to be independent from spain, and the u.s. wanted to end spanish rule in the west.

hope i

-lavira : )