If Plano Carpini could establish Alliance, then Jerusalem could have been under Crusader. BUt I don't see this Alliance stay for longer period. After fall of Baghdad, Crusaders and Mongols will be clashed.
If Plano Carpini could establish Alliance, then Jerusalem could have been under Crusader. BUt I don't see this Alliance stay for longer period. After fall of Baghdad, Crusaders and Mongols will be clashed.
I think any clash will have to happen when the Il-Khanate accepts Islam as the official religion, and if they can keep up on defeating the Seljuks in Mesopotamia and Anatolia.