I started a campaign as the cumans and next to them I see khazars. I'm confused, I don't see them in the list of factions playable. It says rebels next to them. Are rebels one faction, or are there different rebels in different locations? cumans can recruit penecheg and khazar units, but I cannot find those two factions. I also noticed that georgia is in the game. I can't seem to select them either. Is there a simple way to make them playable?