Through the analysis of international perceptions and power, it shows that South Vietnam was a vital interest of the United States. The book provides many new insights into the overthrow of Ngo Dinh Diem in 1963 and demonstrates that the coup negated the South Vietnamese government's tremendous, and hitherto unappreciated, military and political gains between 1954 and 1963. After Diem's assassination, President Lyndon Johnson had at his disposal several aggressive policy options that could have enabled South Vietnam to continue the war without a massive US troop infusion, but he ruled out these options because of faulty assumptions and inadequate intelligence, making such an infusion the only means of saving the country.

    We shall continue to have Wars; and some day the world is going to have a war to which the present Will serve only as a try-out. When that war comes our country will prob ably have to bear the burden for the western hemisphere. In that war our navy will be our first line of defense; and what we do for our navy now will have much to do with what our navy will be able to do for us then.