Philip Caputo is a product of the US Marines system during the Vietnam War. The Marine Corp had very extreme policies and expectations that precipitated their questionable actions during the war. Caputo's involvement and unjust persecution is a result of the Marine Corps training and action that leads to the development of psychological problems for its marines. For Caputo, his mindset that leads to his alleged murder is developed in several stages in the time leading to the event; Training, fieldwork, and office work. .
The training process for the marines is the time of the most extreme for a marine's mindset. This is the stage of initial shock of the Corps morals and expectations. Later upon arriving in Vietnam, psychological changes are brought forth gradually through experiences. Training for Caputo established the base for which his later unstable mind would be built upon. This base is established by the discipline that is forced upon Caputo while in camp on the mainland and while on Okinawa. An example being his being caught having a cigarette while training in the Okinawan jungle; "Looking back, I think that much of my behavior later in Vietnam, good as well as bad, was determined by the rebukes I received that day. They installed in me a lasting fear of criticism. "1 He then goes on to say how He didn't want to be seen as inadequate, or anything less than what is expected of him. It is during events like this where he establishes a "whatever it takes " attitude towards meeting the expected levels of soldiering. The next stage builds upon this, portraying to Caputo through his day-to-day experiences what he will believe is the actions needed and appropriate to reach these expectations, which includes kill civilians with reasonable reason.
Caputo's landing in Danang marks the beginning of the next stage of psychological changes that causes his later actions. Once in Vietnam, training becomes an afterthought.