Why the US lost Vietnam

1. US military tactics in Vietnam
The US had very poor tactics. The US did not know how to fight a guerilla war. source 40 confirms this, showing that the soldiers had no hope of winning the war. Also, the US never had experienced soldiers in Vietnam, according to source 43 the recruits the army was choosing were not only inexperienced, but not very intelligent either.
2. The unpopularity of the South Vietnamese regime
Diem oppressed Buddhists (which is the main religion in Vietnam), as well as being corrupt. Diem spent all his money on material goods rather than military supplies. Source 33 shows Quang Duc burning himself in protest of the attacks on Buddhist shrines by Diem.
3. The experience of the Viet Cong and the inexperience of the American soldiers
The Viet Cong were more experienced because they knew the terrain. Also, they did not have the option of leaving the army after 1 year. According to source 43, soldiers served 1 year, and just when they were getting the hang of it, they left.
4. Domestic opposition to the war in the U.S.
The people of the US became more and more upset with the war as time went on. They began to see people getting killed, like in source 57, on a regular basis. By 1973 the public demanded th war to end.
5. Chinese and Soviet support for the Viet Cong
Source 31 shows the Ho Chi Minh trail. This trail was used by the Vietnamese to get supplies from the USSR and CHina.
6. 'But did they really lose?' Summarize the argument put forward in Source 57, and your view on it.
I think that the US did not really have a clear direction and purpose when it went into Vietnam. The US wanted to destroy the idea of Communism with guns but it did not work. By the wnd of the war, we just wanted to get out of the war without looking bad. I think, although the US was not exactly defeated, it did fail at everything it tried to do in Vietnam.
Add other if you think there are factors you should consider.