Code of Conduct

McCain relied a lot on the  Military Code of Conduct during his years as a POW. What is the value of a code of conduct? McCain confesses in the book that he succumbed after 10 months of incarceration to the demands of his captors to confess his “crimes.” Which fact, do you think, plays a larger role in his attitude toward others in the prison camps who collaborated more extensively and/or were able to be released because of their role?