Question

How and why did the goals of United States foreign policy change from the end of the First World War (1918) to the end of the Korean War (1953)

Answer 1

how: from a policy of isolationism to a policy of containment

Step-by-step explanation:

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Answer 2

After world war 1 the United States wanted to isolate themselves from things like that because of how bad the war was. They went as far as to not join the league of nations that their President made himself with other presidents. After the Korean War, they decided to not isolate themselves and meddle as much as possible to prevent the spread of communism because it would strengthen the Soviet Union who was the main enemy.