Gonna have the fattest troops in the world.
Relative to other fast food Chik-fil-A is not too bad on calories.
Young active troops burn up the calories so that isn't going to be that big of deal. There are already fast food restaurants on most bases as Longknife said above.
When my son was at Ft Bliss in predeployment training as a Cav Scout he stayed thin and slim despite eating a lot of calories every day. You burn a lot of calories training.
My wife and I eat very seldom eat fast food. Like maybe twice a year at most. However, when we do most of the time it is Chik-fil-A because they serve better quality food than most fast food places. Besides we like their Christian values.