My husband travels considerably but nothing like he would if he served in the military. i know from just my limited experience that the longer he is gone, the higher the stress level and the better the chances are that my parenting skills suffer.
Bottom line... i get tired and the only person/people to take it out on are the kids. That is by no means right but I know that is what happens...
I can only imagine that multiplied by 1,000 or so for all of the additional stresses that are added into that situation...