I think I proposed a middle east split somewhere else and got down a few ideas. I would say the Rashidun aren't important enough to warrant a split from the Ummayads or the Umma if either are included, but I think including the Umma may be a little insensitive or contreversial, so I wouldn't reccomend it. I'd go with: Umayyads - Faith and War. Abbassids - Science and Faith Almohads/Almoravids/Cordoba - Culture Ayyubids - Already done. Modern Arabia (representing Saudi Arabia and the Gulf states, personally I'd have them led by Shiekh Zayed of the UAE rather than one of the Saudi Kings, as though Saudi Arabia is the main player in the region, I feel Zayed achieved more in his reign than Faisal.) - (tonnes of) Gold and Tourism. Therefore covering basically every victory condition. I'd be interested, I've ideas for all 4 here too. I love civ splits, I think there are a few other civs that could be split, if not all of them, I can't think of a civ that doesn't have a couple worthy incarnations. Well... maybe not the Zulu.