lol Mongols didnt take all of europe... a decent sized chunk of eastern europe. but that was it. You also gotta know the persian empire was done in by Alexander. Parthian thats a different story (which I do not know the end to funnilly enough)

nuff of this tho...

Nomads need to withdraw because they rely on bows and other missiles. I'd say withdrawl can lead to momentum given to the enemy. Which hurts you in the long run. Giving them a Pyhrric victory is a victory for you.