Why did Americans get involved in the Vietnam war?
The U.S. made a pact with several nations that we would unite against any Communist aggression. As with much of the international agreements, the United States took it seriously while many other nations refused to do so. Eventually the liberal media turned against the war and was able to change public opinion. Many members of the media had leftist leanings and some actually supported the Communist attempts to take over the world.
Americans thought it was none of their business to interfere in a matter in Vietnam. They also didn't want to get involved because they had just fought World War II against Germany and Japan. Eventually when the war started Americans were against it because of the draft which forced men between certain ages to go to war.
The Americans did not make war with Vietnam. There was no Vietnam. There were two countries: NORTH Vietnam and SOUTH Vietnam. NORTH Vietnam attacked SOUTH Vietnam. The US (Americans) defended SOUTH Vietnam. The US never invaded NORTH Vietnam (the US bombed it though). NORTH Vietnam invaded SOUTH Vietnam. NORTH Vietnam was (and still is) a communist nation. The US was against communism.