Survival for the fittest

The fittest get chosen for the army.
But war doesn't ask if your're fit or not. It even involves those ones who would never think about going into fight.
Everyone is called to show his best, even the sick and disabled ones.
Probabilities may be set lower, but the healthy one has no guarantee either to make it through alive.
No matter what the body and the attitude is made, efforts still keep their influence.
If you learn how to use a gun, it doesn't matter if your bones are fresh or broken.
What counts is what you make out of the ressources you have.