I believe that you let them go free and take all of their equipment.
Seriously though, whatever happens to these guys is entirely up to your imagination, since the game never state them outright. It's one of those nuances best kept abstract.
Seriously though, whatever happens to these guys is entirely up to your imagination, since the game never state them outright. It's one of those nuances best kept abstract.
Yes. Yes there is an undead army. Undead, demons, undead that has been boiled and dried in sulfuric acid, undead that has been burnt, demon artificers riding a primitive car and wielding a blunderbuss, demon lords wielding an axe that loooks like a bastard child of Gothic horrors and Japanese RPG's oversized buster blades...
YOU are that undead army. It is just as amazingly awesome as it sounds.
Edit: Also, when you leave prisoners there is a little foot party left on the map that says "routed enemies" or something and that is all the routed/uncaptured prisoners.