What's the most factions you've seen in a single battle?

[Martok]

I've been involved in a 1 vs 1 vs 2.

Me and my allies vs Rebels and an invading faction.

Same here. Four armies at once has been my max.


I can't remember who it was now, but I believe someone here posted last year about having been involved in a battle (as the Turks/Seljuks, I think) where -- as the defender -- he had to fight off 3 Crusades plus a regular invasion force from another faction (the Hungarians, maybe?) at Constantinople. I can't remember whether the player had to fight the 3 Crusading armies and then the 4th army separately, or if all 4 enemy armies allied together against him. In any case, that was at least one battle where 5 different factions were on the field at the same time.