No matter what you do, the bullet with your name on it will get you. It may not be fair, but it is the law. If the rear echelon troops are really happy, the front line troops probably do not have what they need. If you are wearing body armor, the incoming will probably miss that part. It hurts less to die with a uniform on than to die in a hospital bed.
Happiness is a belt-fed weapon.
If something hasn't broken on your helicopter, it's about to. Eat when you can. Sleep when you can. Visit the head when you can. The next opportunity may not come around for a long time.