Is it possible to submit to the Mongols?
For me this is the most important question.
...
As an aside, creating a vassals and tribute is pretty much the extent of power in CK2.
Five or ten more years between one succession and the next might well have seen a lot more of Europe incorporated as a vassal of the Horde. Golden, Ilkhanate, or ideally, even a unified Mongol ulus. That was what stopped their surge westward - it wasn't that they had conquered a world-spanning empire just because they had never encountered a fort, a forest, or a Pole.
:rofl: