I've never met a soldier who knew he was a hero. It's not false modesty. They simply decide to do something that they know they must do, usually for there comrades, because if they don't, those people will suffer in some way. For them, that compulsion is far stronger than any fear. The fact we find it exceptional is a sad indictment of the human race. I'd like to live in a world of heroes. If we did, there would be no wars.