It made getting from New York to the Pacific ocean easier and faster and getting from San Francisco to the Atlantic ocean easier and faster. Hope this helps!
They got to know with the photographs from the U - 2 spy plane.
<em>Hope this helped! :)</em>
End of <span>the Civil War to 1900</span>
Answer:
Because of Adolf Hitler
Explanation:
In the decade from 1845 to 1855, more than a million Germans fled to the United States to escape economic hardship. They also sought to escape the political unrest caused by riots, rebellion and eventually a revolution in 1848. ... With the vast numbers of German and Irish coming to America, hostility to them erupted.
