Bright Shining Lie. John Paul Vann and America in Vietnam, Paperback/Neil Sheehan

Blunt, idealistic, patronising to the Vietnamese, Vann was haunted by a shameful secret - the fact that he was the illegitimate son of a 'white trash' prostitute. Gambling away his career, Vann left the army that he loved and returned to Vietnam as a civilian in the pacification programme.