The Mongol invasions and conquests took place during the 13th and 14th centuries, creating history's largest contiguous empire, the Mongol Empire (1206–1368), which by 1260 covered large parts of Eurasia. Historians regard the Mongol devastation as one of the deadliest episodes in history.[4][5]
^McEvedy, Colin; Jones, Richard M. (1978). Atlas of World Population History. New York, NY: Puffin. p. 172. ISBN9780140510768.
^Graziella Caselli, Gillaume Wunsch, Jacques Vallin (2005). "Demography: Analysis and Synthesis, Four Volume Set: A Treatise in Population". Academic Press. p.34. ISBN0-12-765660-X