An exhaustive study of the US’s involvement in Vietnam since 1945 is completed. The study was ordered in early 1967 by then-Defense Secretary Robert S. McNamara, partly to determine how the situation in Southeast Asia had gotten so out of hand. The study, entitled “United States-Vietnam Relations, 1945-1967,” is by the “Vietnam Study Task Force,” led by Leslie H. Gelb, the director of Policy Planning and Arms Control for International Security Affairs at the Pentagon, and comprised of 36 military personnel, historians, and defense analysts from the RAND Corporation and the Washington Institute for Defense Analysis. The study is huge, composed of 47 volumes and spanning 7,000 pages of material. It covers the time from 1945, when Vietnam was under French colonial rule, through the 1968 Tet Offensive. The study conclusively shows that each US administration, from Harry S. Truman through Lyndon B. Johnson, had knowingly and systematically deceived the American people over the US’s involvement and interventions in the region. Historian John Prados will later observe that the study, later dubbed the “Pentagon Papers” after it is leaked by RAND analyst and task force member Daniel Ellsberg (see September 29, 1969 and March 1971), represents “a body of authoritative information, of inside government deliberations that demonstrated, beyond questioning, the criticisms that antiwar activists had been making for years, not only were not wrong, but in fact, were not materially different from things that had been argued inside the US government.” [Moran, 2007]