I have a problem. In my current game, Europe has reached the point where all the Empire start crumbling as vassals declare independence. However, those vassals soon join new Kingdoms. Actually, they almost all join the same Kingdom: The Christianized Seljuk Turks. The Seljuks now own at least half of the British Isles, as well as a large portion of France and parts of Sweden. Is it possible to stop this from happening?