How does Lee describe the price of war in The Killer Angels?

One of Lee's references to the price of war is as follows;

"We are never prepared for so many to die. So you understand? No one is. We expect some chosen few. We expect an occasional empty chair, a toast to dear departed comrades. Victory celebrations for most of us, a hallowed death for a few. But the war goes on. And the men die. The price gets ever higher. Some officers... can pay no longer. We are prepared to lose some of us." He paused again. "But never all of us. Surely not all of us. But... that is the trap. You can hold nothing back when you attack. You must commit yourself totally. And yet, if they all die, a man must ask himself, will it have been worth it?"