The changes made in the foreign policy of the United States from world war I to the Korean war are moving from independent countries to interventionism countries because of the occurrence of international events and economic conditions.
After the end of WWI and the Korean war, policies have been changed with the movement from protectionism to intervention from countries and their control due to events occurring internationally and changing economic conditions.
The United States adopted interventionism from isolationism due to the threat to the democracy of America. By the end of WWI and the Korean War, the economic conditions are not stable due to the weapons and equipment used in the war.
Therefore, changes in public opinion and the emergence of interventionism took place in the United States after war.
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