Mongolian race - Ascension

Nomads are simply nomadic people (I think it's French). How would you implement them? It would sound silly. And horses, as a separate unit – why not? Speed is the main characteristic of the Mongols, so let there be many nomadic units. Any other comments/suggestions?
P.S. Today I consulted with my academic advisor about the mythology of the Mongols. Only worship of Heaven – and that's it. A rather limited choice :(