The military steroid monkeys I have known were all rear echelon types whose job allowed them access to weight-lifting facilities and wasn’t adversely effected by useless upper body mass. Combat types were pretty universally fit but not “pumped up.”
Chewing coca leaves has been used by andean peoples, including their warriors, to relieve fatigue and diminish appetite.
Can’t anabolic steroids also be used to speed up recovery from tissue damage? I’m sure that is something that would make them useful for soldiers too.