the US. CORDS was an integrated group that consisted of USAID, U.S. Information Service, Central Intelligence Agency and State Department along with U.S. Army personnel to provide needed manpower. Among other undertakings, CORDS was responsible for the Phoenix Program, which involved neutralization of the Viet Cong infrastructure. Vann served as Deputy for Civil Operations and Rural Development Support CORDS III (i.e., commander of all civilian and military advisers in the Third Corps Tactical Zone) until November 1968 when he was assigned to the same position in IV Corps, which consisted of the provinces south of Saigon in the Mekong Delta. Vann was highly respected by a large segment of officers and civilians who were involved in the broader political aspects of the war because he favored small units performing aggressive patrolling instead of grandiose engagements by large units. Unlike many US soldiers, he was respectful toward the ARVN soldiers notwithstanding their low morale and was committed to training and strengthening their morale and commitment. He encouraged his personnel to engage themselves in Vietnamese society as much as possible and he constantly briefed that the Vietnam War must be envisaged as a long war at a lower level of engagement rather than a short war at a big-unit, high level of engagement. On one of his trips back to the U.S. in December 1967, Vann was asked by Walt Rostow, an advocate of more troops and Johnson administration National Security Advisor, whether the U.S. would be over the worst of the war in six months: "Oh hell no, Mr. Rostow", replied Vann, "I'm a born optimist. I think we can hold out longer than that." Vann's wit and iconoclasm did not endear him to many military and civilian careerists but he was a hero to many young civilian and military officers who understood the limits of conventional warfare in the irregular environment of Vietnam. After his assignment to IV Corps, Vann was assigned as the senior American advisor in II Corps Military Region in the early 1970s when American involvement in the war was winding down and troops were being withdrawn. For that reason, his new job put him in charge of all United States personnel in his region, where he advised the ARVN (Army of the Republic of Vietnam) commander to the region and became the first American civilian to command U.S. regular troops in combat. His position was the