During the period of U.S. combat involvement in the Vietnam War, there was considerable argument about progress among the Department of Defense under Robert McNamara, the CIA, and, to some extent, the intelligence staff of Military Assistance Command Vietnam.
Selama periode keterlibatan tempur Amerika Serikat dalam Perang Vietnam, muncul perdebatan seputar kemajuannya di internal Departemen Pertahanan pimpinan Robert McNamara, CIA, dan staf intelijen Military Assistance Command Vietnam.