How does the narrator describe the boys?
He has to "drag" the boys over from playing "some" game speaks volumes about their relationship - they clearly don't want to come, and he has no idea of what they're doing. He calls them "soft" - which is another example of him disliking anyone who shows care or compassion, and another reminder of his drill instructor's attitude - while the line about "teaching them about life and death" seems quite astonishingly harsh on two children, whose ages we don't know. But the really breathtaking thing about this is the realisation that he is doing this
because he cares - and this is further heightened by the use of first person which forces us to take his perspective.