“If you have any doubts as to what you’re to do, I can put it very simply,” he said in his jarring falsetto. “The idea is to move ahead, and you usually know where the front is by the sound of gunfire. To make it perfectly clear to you: suppose you lose a hand or an ear is shot off, or perhaps a piece of your nose, and you think you should go back to get first aid. If I see you, it will be the last goddamn walk you’ll ever take. As an officer, you’re expected to move ahead.”