[justsomeguy]

Originally Posted by Dengar

Or you could (try to) exhaust their military resources/morale. You know, how wars are USUALLY fought?

Wars are USUALLY fought with people who know when to give up and negotiate for favorable terms. You've already dismissed such civilities. They've already fought for 70+ years, with waves after waves of ever stronger and more numerous units. And others have already mentioned that the Vagans don't give up (to the point where we see operators stay at their stations in Ambat even after the self destruct was set). Not going to happen. If they don't give up, genocide will be the end result even if not the intent.