katchen
Banned
The Mongols rule weakened because they lost in Palestine to the Mamelukes. If ATL with the Crusader's help, they wiped out the Mamelukes and conquered Egypt and then the Seljuq Turks, who would finally defeat them? The Timurids in the 14th Century? The Djungars in the 16th Century? Perhaps. But the Mongols might well have had a longer run as rulers in the Middle East. Though they finally converted to Islam. Which I believe may have been Shia Islam, given that they ruled Iran. Shia rule from Iran to Egypt to Asia Minor would be a definite change ATL. And the Shiites might well be more tolerant of Crusaders and let them continue as vassals or tributaries.