[Ozen doesn't like to sugarcoat things, the world, or rather multiverse, isn't a nice place.]

Does a nation ask for permission to draft soldiers?

While this is guess work on my part, it would make sense. Why make our departures so non-consensual if it were harmless? Why waste the lives of your own people when you could send expendable alien forces instead?

Why bring so many people if to do nothing with them?