what are the top 3 reasons for the success of mongol empire?

Question

=> is this correct:

Mongols ended up ruling neighboring sedentary states directly rather than extorting them as earlier steppe empires had done

Answer 1

They whipped everybody around them
They ruled autocratically, with a fast hand, subjugating all they beat.
The established a strong government to continue the rule established by the military troops.

Answer 2

Yes -- you've given one reason for the Mongol Empire's success. I'm sure you can find more reasons in your book or in this article.

http://encarta.msn.com/encyclopedia_761571469_5/mongol_empire.html