10Bears...
I can't find any mention of withdrawal of troops under Kennedy. Can you provide a link?
I did find this at the same place:
September 2, 1963 - During a TV news interview with Walter Cronkite, President Kennedy describes Diem as "out of touch with the people" and adds that South Vietnam's government might regain popular support "with changes in policy and perhaps in personnel."
Also during the interview, Kennedy comments on America's commitment to Vietnam "If we withdrew from Vietnam, the Communists would control Vietnam. Pretty soon, Thailand, Cambodia, Laos, Malaya, would go..."
October 5, 1963 - Lodge informs President Kennedy that the coup against Diem appears to be on again.
The rebel generals, led by Duong Van "Big" Minh, first ask for assurances that U.S. aid to South Vietnam will continue after Diem's removal and that the U.S. will not interfere with the actual coup. This scenario suits the White House well, in that the generals will appear to acting on their own without any direct U.S. involvement. President Kennedy gives his approval. The CIA in Saigon then signals the conspirators that the United States will not interfere with the overthrow of President Diem.
November 2, 1963 - At 3 a.m., one of Diem's aides betrays his location to the generals. The hunt for Diem and Nhu now begins. At 6 a.m., Diem telephones the generals. Realizing the situation is hopeless, Diem and Nhu offer to surrender from inside a Catholic church. Diem and Nhu are then taken into custody by rebel officers and placed in the back of an armored personnel carrier. While traveling to Saigon, the vehicle stops and Diem and Nhu are assassinated.
At the White House, a meeting is interrupted with the news of Diem's death. According to witnesses, President Kennedy's face turns a ghostly shade of white and he immediately leaves the room. Later, the President records in his private diary, "I feel that we must bear a good deal of responsibility for it."
November 22, 1963 - President John F. Kennedy is assassinated in Dallas. Lyndon B. Johnson is sworn in as the 36th U.S. President. He is the fourth President coping with Vietnam and will oversee massive escalation of the war while utilizing many of the same policy advisors who served Kennedy.
November 24, 1963 - President Johnson declares he will not "lose Vietnam" during a meeting with Ambassador Lodge in Washington.