This volume contains the U.S.' explanation for the war and a review of the history of Vietnam and of the war, as well as various problems during it, including drug and racial problems, desertion, sedition, and treason. It also contains information about POW treatment, POWs and MIAs, the CIA and the drug trade, war crimes, PTSD, Moral Injury, other topics relevant to understanding what happened and why. There is also photo overview of combat, in South Vietnam, in 1968, a decisive year in that war. The autobiographies in the first four volumes of Combat Veterans' Stories of the Vietnam War are told by 57 Americans, Canadians, and Australians that fought in that war. Volume 4 also contains information about U.S. allies that fought in Vietnam.