Mamluk Empire (Pax Syria)

Formation
The Mamluks were slave warriors that fought mainly for the Egyptian Fatimids and Ayyubids. They took over the Ayyubids when their Sultan As Salih died. They overthrew the heir through Assassination, and their leader Baibars ruled the empire. They fought the Mongols a lot. Some Syrian oppositions oppose them, and support the Mongols. They failed miserably.

The Wars with Remnant Crusader States and Seljuks
The Mamluks fought, but never defeated the Crusaders. They were also fighting Seljuk Turks. They made a puppet Abbasid Caliphate. They even tried to retake Baghdad with them. (Failed because they sent around 300 people to takeover the city.) They fought the Mongol States too, but failed to do anything incredible to them.