[@Hael] You know, now that you mention it. This gives me an idea. What if there was a Cult or somesuch organization that is Pro-Xim, that want to fully embrace the "Evolution" "Ascension" or whatever the Xim offer, these people could've been active during and after war as collaborators for the Xim. 

And after the war, some may have even left with the Xim, while others remained behind to continue the "war".