I arrived at Princeton in the summer of 1975, just months after the fall of Saigon. At the time I was a serving officer in the United States Army and a veteran of the Vietnam War. The army, generously from my point of view, was sending me to graduate school to prepare me to teach at West Point. To emphasize: The army sent me to Princeton not to become a professional historian but to acquire knowledge sufficient to enable me to convey to cadets some basic grasp of U.S. history. After a three-year teaching stint, I would return to soldiering.