Thirty years ago this month, I first went to the field with the United States Marine Corps. I was a new staffer for Senator Robert Taft, Jr., of Ohio, and the Marines had invited me down for the "Company War" at The Basic School at Quantico, Virginia. Early one frosty November morning, I found myself standing in the commander's hatch of an M-48 tank moving about two miles per hour with the infantry walking alongside, just as in 1917. When we reached the "objective," which was an enemy machine gun nest, the tank stopped while the infantry formed a line...