As a kid, an abiding fear, reinforced by movies and comic books, was that I would die on some foreign battlefield. I would become a casualty of the war that every generation of American men seemed destined to fight: World War I for our grandfathers and World War II for our fathers and Korea for our older brothers. Then came Vietnam, which is where many of my generation drew the line: "Hell no, we won't go," in the chant of the day. And I didn't. It turned out I didn't have to. Just luck. I enlisted in the 42nd Infantry...