The best description of the Domino Effect in relation to US policy in Indochina during the Cold War is the fear among U.S. policy makers that if communism succeeded in Vietnam, it would sweep through the rest of the region .
Explanation:
The Domino Effect Theory was a theory in the foreign policy of the United States of America during the Cold War, which assumed that a communist state would induce communist governments to take power in neighboring states, such as the impact of falling dominoes. The idea was first used by President Harry S. Truman to justify sending military aid to Greece and Turkey in the 1940s, and was an important part of President Dwight D. Eisenhower's foreign policy in the 1950s. The United States government was particularly concerned about the spread of communism in South East Asia, and the theory was used to justify the military intervention in the Vietnam War.
