According to Pentagon records, nearly four million personnel served in and around Vietnam; most in Vietnam, others on flight bases in Thailand and ships in adjacent South China Sea. Of those 3,917,400 million men and women ordered to the Southeast Asia Theater, ninety percent were not sent there to fight. They were there to support the ten percent who were. Support troops included pilots, sailors, medics, nurses, cooks, clerks, drivers, engineers, communications people, military police, and...