Ok, DC is a bit different than FRUA.....
if they're not joining the party, they're monsters, technically, not NPCs. You need to make all hostile NPCs monsters. Once you've done that, go into "event" mode and click on the location you want the battle to happen and there should be an event type called "Combat" or something like that. Then you just add the warriors you added in the monster editor. If you want it to be random, you want Step events....
Yeah, don't question our sanity, people do that enough....
