MACV describes the evolution of the command during the period of gradual expansion of the American effort in South Vietnam. From its establishment in 1962 as a small, temporary organization to administer an assistance program, the Military Assistance Command, Vietnam, grew by late 1967 into a large, permanent headquarters that directed more than half a million American soldiers, sailors, airmen, and marines in a wide range of combat and pacification operations. Graham A. Cosmas tells the story of MACV's development as an organization and of the command's role in making and implementing American national policy in Southeast Asia. The volume treats both national-level decisions and military operations from the perspective of the theater joint commander. It recounts how the MACV commander and his staff viewed the war at various periods and how and why they arrived at their decisions. The volume analyzes the interservice politics of organizing and managing a joint command; MACV's relationship with Pacific Command, the Joint Chiefs of Staff, and the secretary of defense; and the evolution of the command's dealings with its South Vietnamese and third-country allies. As an experiment in nation-building, the story of the Military Assistance Command contains many parallels to more recent Army engagements and so serves as a potential source of important lessons.