By the end of 1965, the United States had 184,300 troops in Vietnam.
Not many because most of the communist troops were from the north. Take my word cas I am vietnamese if you can't tell by my name
5000000
roughly 60,000
zero
There were not any troops in Vietnam during the Kennedy administration. Just 500 military advisors. Kennedy was assassinated before we sent troops
See: Vietnam Time-line
When President Nixon took office there was approximately 536,100 American troops in Vietnam. President Nixon immediately started reducing the number of troops in Vietnam.
8 months
Many who didn't have to fight the war, were for it. Many who had to fight the war, were against it.
None.
He brought in more troops in Vietnam and many people knew that was no use