Why America waged war against Vietnam?

Question

First of all I am non American so I am novice in American History ( thats why raising very basic Question ). I am looking to google for it but everything is too descriptive. If anybody know very **specific and important incident** that triggered war; That is sufficient for me.

Answer 1

It all comes down to the policy of containment during the Cold War, which meant that the United States wanted to prevent any spread of communism. So when non-communist South Vietnam was attacked by communist North Vietnam, the US got involved. The US also had a theory called the domino theory that if one country went communist, the rest around it would follow.