The main factor of the Vietnam War was the spread of communism. It was also the basis of the conflict of the entire Cold War. The United States was very concerned with communism spreading in Asia.

The US presidents of the Cold War created various policies to keep communism in its place. Click on each of the US president below to determine their policies on communism; the map will show you where in the world this policy had impact.

Interactive exercise. Assistance may be required.

Image of the side of ten tiles (dominoes) that are standing. The name of a country is written on each side: China, Korea, Vietnam, Laos, and Cambodia are falling. Thailand, Malaysia, Indonesia, Burma, and India are still standing.

Source: Domino Theory, nyenyec, Wikipedia

Look at the image above. Which anti-communist policy does the image illustrate? Explain the theory and how it relates to the image above. Record your answer in your notes.