The United States became involved in many conflicts around the world in order to contain communism. Please explain each question:

- Describe how the domino theory led to U.S. involvement in Korea and Vietnam?

- Explain why it was so difficult for the United States to win the war in Vietnam?

- "The Soviet Union is responsible for the Cold War lasting as long as it did because they instigated war on numerous occasions." To what extent do you agree or disagree with the statement?