In the 1200s, European rulers trembled before Mongol forces sacking their cities. But then the army withdrew—the reason why is still up for debate.

Accompanying Elbegdorj's post were maps of the Mongol Empire of the 13th and 14th centuries. One shows the breadth of the vast but short-lived empire, which at its peak covered 9 million square miles.

The Mongol Empire’s relationship with the popes reached a peak in the latter 13th century. These remarkable relationships helped Mongol diplomacy to set foot in Europe, expanding exchanges and ...

In his ahistorical rant, Putin also forgot to mention that for much of the subsequent period Moscow, Kyiv and Novgorod all fell under the Mongol Empire, which at its peak in the 13th century ...

At its peak, the empire spanned a massive 5.5 million square kilometers (over 2.1 square miles), and stretched to parts of ...

In the late Middle Ages, the Mongol Empire became the largest the world had ever seen. At its peak, maybe 100 million people lived under its banner, led by the Great Khans of the Asian steppe.

Was there more to the Mongol Empire than just bloodthirsty conquest? Turns out, they were quite a bit more advanced than you might have thought. Grunge (Video) The Untold Truth Of The Mongol Empire.

The Mongol Empire started in 1206 when the warlord Genghis Khan began expanding his domain from Mongolia across China and what is today Russia and Eastern Europe.

Archaeologists have discovered the skeletal remains of three individuals within a former medieval stronghold in Poland who were possibly victims of the Mongol invasion of Europe in the 13th century.