The author, Lieutenant George M. Papa, details the time he spent as the Platoon Leader of 3rd Platoon, Alpha Company, of the 1/46 Battalion, of the 196th Light Infantry Brigade of the Americal Division in the 'free-fire' zone of 'Eye Corps', during the Vietnam War. A 'free fire zone' means that no other non U.S. soldier or civilian is to be in that zone, period, which is away from the populated coast, and if they are, they can be fired on without waiting to be fired on first.
Lt. Papa's full 13-month tour fell between the North Vietnamese Army's destruction of his battalion headquarters in May 1969 (battle of Landing Zone Professional) and the NVA overrun of that same relocated HQ in March 1971 (battle of LZ Mary Ann). Both of these defeats are detailed.