He is absolutely right about the bond, in combat you only have each other, you sleep next to each other, eat with each other, play/work/laugh/cry with each other. You aren't worried so much about the war but taking care of your brothers and trying to keep them safe and you trust them with your life and know they are watching your six (back). But once you get back to Civilian life that adrenaline doesn't shut off, I still dream about it every night with out fail, and I rarely speak to my old friends I served with although there are a couple I still keep in contact with and one shot himself I guess life after war was to much for him. He was a crazy bastard for sure.