The largest country in the world today is Russia, with about 11% of the global landmass. It was far exceeded by the British Empire, which at its height controlled about a fourth of the world’s ...

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.

Manvir Singh reviews “The Mongol Storm,” by Nicholas Morton; “The Horde,” by Marie Favereau; “Empires of the Steppes,” by Kenneth W. Harl; and “Nomads,” by Anthony Sattin.

The inset map shows the location of Cluster 27 in red ... This remarkable find not only enriches our understanding of pre-Mongol Empire Mongolia but also highlights the importance of continued ...

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.