Korean War/Vietnam War

The U.S got involved in both the Korean war and the Vietnam war because of their Communist ideas. The U.S at the time had a goal to contain the communist countries of Vietnam and Korea. The U.S government stepped in so they could stop Communism from spreading to other countries around the world. A great example of this is when Communist North Korea started to push into South Korea. 

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The overall goal of the Americans stepping into the whole situation was to try to contain these communist countries. The Americans feared that the communists would spread into other countries.