Why did the US fail to save South Vietnam from Communism?

The US failed to save the South from Communism due to many interconnected reasons. America did not have the ordinary Vietnamese on their side, and like the French and Japanese before, they were seen as 'foreign occupiers'. Furthermore, America faced much controversy over the war within its own borders, and therefore was fighting a war unpopular to its own people and the people which they tried to 'save'. Militarily the US failed to stop guerrilla …

…unpopular side in the war and could not over come the North because of the lack of support from the South. Even the American public, towards the later years of the war, were very against the American Government's objectives, and were seen as enemies of the State. Ho Chi Minh on the other hand was highly supported within Vietnam and thus these reasons state why Vietnam could not and would not be saved from Communism.