[quote=@Drunken Conquistador]
I had thought that the double army stuff would either make your soldiers worth two on the battlefield or an "LOTR Army of the Dead" kind of deal. But I like [b]Willy[/b]'s ideas, specially B
[/quote]I love all of them. Each gives you a different set of consequences to RP out.
Also if it's random imagine what would happen if you don't know these soldiers would either disappear after the battle or not.
Oh, and arm of the dead sounds like a good Type D variation.

Type D - Army of the Dead: Dead soldiers are resurrected and transported to the battlefield in order to fight again. The boon's magic chooses the most recently deceased soldiers that fit your army's makeup the best. Type D1 resurrects them as rotten undead, frightening in appearance and degraded in equipment. The magic conserves them and restores their mobility. This also makes them somewhat more resistant to harm but the still die by roughly the same as human soldiers do. After the battle they stay and live on for however long they would normally have if they were not killed in battle. Given their appearance though it's difficult to tell how long they last which often feels undeads with anxiety after they walked among the living for over a decade. Type D2 resurrects the dead in their former glory. They are humans back in their original appearance and health as well as fully restored equipment. With some luck long dead fathers can return to life for an emotional reunion. Of course the resurrection can also cause quite a through mess but at least you don't need to think about making a separate district for your new batch of undead.