i have a theory.

The mighty mongolian hordes was stopped, by the valiant efforts of the Bagdad's hawkers and merchants, eager to sell them trinkets and things.

The hordes attacking representing that after being alot poorer, the Mongolian hordes start looking to attack ANYONE. Kind of like the new (broked) tourists mugging someone for money, but on a larger scale.

hmm, is there a way to get the horde going? (editing file) for goodness' sake, the mongolian horde is meant to be the most mobile army ever on earth, not a bunch of elite boy scouts dancing around the campfire by the desert. the only fire they'd start would be on the enemies' settlement.