New governments in Washington and Saigon created new pacification programs in 1964 as it became clear that, contrary to the U.S.'s optimism of 1963, the Viet Cong were steadily taking control of more territory and more people. British counter-insurgency expert
Robert Grainger Ker Thompson said that the government's survival was at stake. Secretary of Defense
Robert McNamara said in May 1964 that he could not understand "how the Viet Cong continually attacked and overran hamlets that the government and MACV listed as secure." The next iteration of the pacification program came in 1964 with, for the first time, the direct participation in planning and execution by the American Embassy and MAC/V, now headed by General
William Westmoreland. The
Chien Thang (Struggle for Victory) pacification program was less ambitious than the Strategic Hamlet program, envisioning a gradual expansion, like an "oil spot" from government-controlled to communist-controlled areas, by providing security and services to rural areas. Along with the Chien Thang program was the related
Hop Tac (Victory) program, directly involving the U.S. military in pacification for the first time. Hop Tac envisioned a gradual expansion outward from
Saigon of areas under South Vietnamese government control. These programs also failed as the
South Vietnamese army was unable to provide adequate security to rural residents in disputed areas. In 1965, with the government of South Vietnam failing, the U.S. became directly involved in the war with a large infusion of American combat troops. Pacification programs took a back seat to Westmoreland's strategy of attrition—attempting to kill Viet Cong and an increasing number of
North Vietnamese Army troops with
search and destroy missions that utilized U.S. advantages in mobility and firepower. To defeat the Viet Cong, Westmoreland expressed his strategy in one word: "Firepower." Doubts about the wisdom of the attrition strategy were expressed by many U.S. officials and military officers. A 1966 internal army study led by General
Creighton Abrams concluded that pacification should be the main priority of the U.S. in Vietnam and that the U.S. Ambassador should have "unequivocal authority" over all U.S. activities, including military, in Vietnam. Westmoreland succeeded in squashing any implementation of the recommendations in the study. ==Renewed attention to hearts and minds programs==