Near the end of the Year of the Ox did Ogadai Khan fall sick, and it was feared he might not live; yet under the care of the Chinese physicians he at last recovered, and lived many years.
And in the Year of the Leopard did Batu Khan lead the Horde into the land of the Franks, which is called Europe. Great was the destruction and loud the weeping of the Frankish women; and when it was done, it was said that a blind man might ride a blind horse from Kiev to Granada without a stumble.
from the Secret History of the Mongols,
author unknown
The departure of the Mongols, after little more than a century of occupation, brought no great surge of enlightenment to Europe; only a new Dark Age, darker than that which had followed the fall of Rome. And, even as the invaders withdrew, there came the Plague to further depopulate and demoralize the Christian world.
Thus Europe took no part in what I have called the Age of Discovery. Even as the Chinese and the Moors explored whole continents beyond the seas, Europe remained fragmented, backward, and racked by squalid petty warfare.
Some have speculated that, had the Mongols been turned back in time, history might have proceeded differently; that it might have been Venetians or Franks, or even Spaniards or Englishmen, who discovered and explored the New World. But of course such questions can never be answered
from A Short History of the World,
by Hamzah ibn-Rashid