As another quibble of a more historical nature, it always bothered me that the Mongolian unique unit was named the
Kheshig, after the bodyguards that *did not* fight with the main army. To quote Wikipedia: "They were distinct from the regular army and would not go to battle with them, instead staying back on guard duty. Their supreme commander was called the Cherbi." A better name for the military unit as portrayed being a major part of Mongolian forces would be after the
Age of Empires II Mongolian unique unit, the Mangudai (more accurately named
Manghud), which was both a tribe name and
a name for a vanguard/light cavalry unit. As light cavalry were about 60% of the Mongolian cavalry forces, it would make sense for the unique unit for Mongolia to be named "Manghud" in future (I sincerely hope they don't name the Babylonian unique unit "Bowman" again either while we are at it).