American Foreign Policy of the Vietnam War
America's involvement in Vietnam can be described as internationalism. Internationalism is a type of foreign policy wherein one nation becomes involved in a foreign conflict to protect their international interests. The United States did not want Vietnam to be completely Communist because they thought that if Vietnam became wholly Communist than the rest of Asia, and eventually the whole world, would follow suit. This is called domino theory because it is similar to knocking over a series of stacked dominoes in that it causes something of a chain reaction.