The sight of troops coming home -- greeted by laughing, weeping friends and family; looking into the eyes of newborn sons and daughters for the first time -- is a cultural linchpin, across all societies, in all times.
Sometimes a soldier, sailor, or Marine is coming home for a visit; sometimes, troops come home because, finally, war is over. No matter. For that moment, at least, they're 'home'. And nothing else gets in the way.