Chapter 6 assesses the ambassadorship of Henry Cabot Lodge II, chosen by President John F. Kennedy to lead Embassy Saigon at the height of the 1963 "Buddhist crisis." South Vietnamese President Ngo Dinh Diem's crackdown on Buddhist demonstrators had alarmed American public opinion, and Lodge decided shortly after taking up his duties that Diem had to go. This view ran counter to that of every senior administration figure - Secretary of State Dean Rusk, Defense Secretary Robert McNamara, CIA Director John McCone, Vice President Lyndon Johnson, and Attorney General Robert Kennedy - all of whom believed that Diem, despite his flaws, was preferable to any alternative and ought to be supported. General Paul Harkins, Lodge's military counterpart in Saigon, likewise felt that Washington should stand by Diem. Lodge prevailed over this opposition through a campaign of secrecy, misinformation, and repeated disobedience. He formed ties with rebel generals and promised them U.S. backing if they overthrew Diem, a policy no one in the White House or State Department had approved. He withheld information about coup plots from his superiors. He refused to follow orders from Rusk to meet with Diem and resolve the situation diplomatically. Diem's deposal and murder were in great part Lodge's doing. However distasteful, that outcome gave America a fresh start in Vietnam.

Roger Hilsman and Robert Thompson prepared plans for Vietnam that counterbalanced the increasing pressure to deploy troops. Thompson had a great influence on McNamara. He informed the Secretary’s frustrations with the US mission’s inability to coordinate existing programs and with the Chiefs’ focus on conventional tools. By July, McNamara instructed the Chiefs to prepare a phaseout plan for US advisors in Vietnam, which was called the Comprehensive Plan for South Vietnam (CPSVN). It was designed to train the South Vietnamese to fight the communist insurgency themselves. Growing unrest in South Vietnam did not dampen these plans; instead, they accelerated. A phaseout brought order to existing programs and promised to secure their long-term funding.