I was wondering when we would get to that.
I believe it would depend on the circumstances of the conscription. I suppose that, legally speaking, if an act of the people's legislature were to bind by law certain individuals to adhere to military discipline that would be as binding as a personal subscription. However, some sort of Plymouth knock on the head and waking up at sea would not.
In the non-legal sense I would suggest that a conscript is far less bound to adhere to mliitary discipline. Which is exactly what we find.
In either case, committing war crimes is against international law. However, as we perhaps need to reiterate, an act of war, duly constituted by the elected head of state is NOT ILLEGAL in any domestic sense. Thus noone in military service can object.