One of the main ways in which changes to the railroad helped American industries to grow is that the expansion of the rail system led to increased migration to the west, which led to more farming and agricultural output. Another would be that it led to settlements that ultimately led to business that were able to conduct business over state lines with great ease.
The main purpose of the Truman Doctrine was to prevent the spread of communism.
On March 27, 1947, Harry Truman gave a speech known today as the Truman Doctrine. Within this speech, he talked about how he wanted to help countries like Greece and Turkey stop the spread of communism.
The United Kingdom did not want to help Greece and Turkey any further, as they had no money to spare after World War II, so Harry Truman decided that the United States would help them stop the spread of communism.
Answer: the second one it good
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Answer:
Explanation:
China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.