Right now the First Crusade for Jerusalem was beaten back, but the second resulted in a DANISH!!! victory... a few years later the Fatimids were in a massive succession crisis, so the KOJ lands were even able to expand a bit into syria... then the Fatimids reblobbed, and Jerusalem's pretty much titular (not literally)
Funnily enough in that game, the Byzantines won Manzikert but lost a Fatimid Invasion to Anatolia, and duyring this succession war they were able to recover everything. Yay Bizzies!