The Army is about everyone being equal
When you are in the Foxhole and being shot at, the bullets being shot at you dont ask if you are Makpid Chalav Yisroel, Beis Yosef or even if you eat Kosher.
Part of army training is getting people to follow this philosophy. You have to have the thinking your fellow soldier is your comrade and equal otherwise you cannot fight together and when one of you is hurt, you have to help your wounded comrade