What were examples of the policy of containment

Another example where we opposed the spread of Communism was in South Korea. When North Korea invaded South Korea to make Korea a communist country, we worked with the United Nations to remove North Korea from South Korea. Under the leadership of General Douglas MacArthur, we were able to keep South Korea from becoming a communist country.

A third example of containment was the European Recovery Program, known as the Marshall Plan. We offered aid to countries that were resisting the spread of communism. For example, Greece and Turkey were two countries that were offered aid. Both countries didn’t become communist.

a. favoring native born americans over immigrants.