There's one faction in this game with Mongolian type cavalry units. But it's a smaller governor (Ma Teng) with no starting cities. The starting position is "very hard" but if you're a fan of maneuver warfare, try this faction. Prioritize horse pastures, build an all cavalry force special unit force (60% cav archer / 40% lancer), put strategist and vanguard generals in command, and then have fun wrecking armies many times your size lolz. Makes me wonder... if China had been unified by this faction, world history would've turned out VERY different! lolz
I wish there was more intel gathering in the game though... there is way too much fog of war and not much to see through it. They removed the agents which you could move anywhere on the map.