I agree that is very impressive especially because it took the Romans much longer.

He was put in charge of the ministry of religious bequests after he married a Mongol.

Did she support his techniques and the ways he was conquering his enemies?

Nasir al-Din al-Tusi: Married a Mongol and was then put in charge of the ministry of religious bequests.

Nasir al-Din al-Tusi: With the fall in 1256 of Alamūt to Hülegü Khan (c. 1217–1265), grandson of Genghis Khan, he immediately accepted a position with the Mongols as a scientific adviser.

Nasir al-Din al-Tusi: Mongols had good military tactics that ensured they would conquer their enemies.

Organization of military, Genghis Khan organized the entire Mongol society into military units of 10,000, 1000, 100, 10. Effectively order/control groups.

New trade channels established between Asia, the Middle East, Africa, and Europe

More bridges built under the rule of Genghis Khan(more infrastructure)

Sent dead bodies who were diseased to the enemy town they were trying to conquer in order to kill the population.