Thirteenth-century conquests that built the largest contiguous land empire and left a death toll still argued in wide scholarly ranges.
Educational history. Casualty figures are documented ranges. This is not operational advice, a ranking of nations, or a how-to for weapons or coups.
The Mongol conquests began as Temujin unified the steppe and took the title Chinggis (Genghis) Khan in 1206. Within two generations Mongol armies had broken the Jin and Western Xia, shattered Khwarezm, taken Kiev's political world, and ridden into Hungary and Poland (1241). The empire later split into khanates while Kublai Khan completed the conquest of Song China and founded the Yuan dynasty (1271).
Deaths are among the least certain in this atlas: published scholarly ranges often sit around 20-40 million across the thirteenth century, with some older figures higher and many local studies lower. Siege massacres (Baghdad 1258, Zhongdu, Nishapur in the chronicles) sit beside famine and displacement. Treat every total as a band, not a census.
The same empire that destroyed cities also ran relay posts (yam), protected some trade, and moved artisans and astronomers across Eurasia -- the "Pax Mongolica" of later textbooks. English memory arrives through Travels of Marco Polo, school maps of a pink-brown blob, and a thin film canon. Korean memory is more specific: the 1231-59 Goryeo wars and the forced 1274/1281 expeditions toward Japan.
Deep introduction
The Mongol wars were a technology of mobility and terror that became, in the successor khanates, a system of tax, post and pluralism -- at a demographic price still counted in ranges.
Chinggis's early wars were against steppe rivals, then Western Xia and Jin. The 1215 fall of Zhongdu (Beijing) is an early named urban catastrophe in the Chinese record.
Ogedei and later Mongke continued the China war; Kublai's Yuan was a conquest dynasty that also became a Chinese state.
The Khwarezm war (from 1219) after the Otrar incident produced the most famous massacre chronicles. Batu and Subutai's 1237-42 western campaign broke Volga Bulgaria and many Rus' cities and defeated European knights at Legnica and Mohi -- then withdrew when Ogedei died.
Hulagu's 1258 sack of Baghdad ended the Abbasid caliphate's old political theatre.
Ain Jalut (1260) stopped the Syrian advance. Japan survived two invasion attempts (1274, 1281) that Korean and Chinese shipyards were forced to support -- a Goryeo trauma as much as a Japanese typhoon legend.
Southeast Asia and Mamluk Egypt marked other edges of the project.
The Golden Horde, Ilkhanate, Chagatai Khanate and Yuan were successor politics, not one forever-army. Plague in the fourteenth century later moved along some of the same routes -- a debated link, not a slogan.
Modern national stories (Russia, Iran, China, Korea, Hungary) each keep a different Mongol.
1206-1294: Chinggis, Khwarezm, Rus', Baghdad, Yuan, Goryeo and the Japan fleets.
Read →
02Decimal steppe armies and conquered levies -- historical, not a how-to.
Read →
03China, Central Asia, Europe, Korea and Japan as historical sequence.
Read →
04About 20-40 million dead, scholarly range -- highly uncertain, stated as a band.
Read →
05Chinggis, Ogedei, Subutai, Hulagu, Kublai, Goryeo kings.
Read →
06Khanates, Yuan China, Pax Mongolica talk, and Korean memory of the Japan levies.
Read →
07School maps, Polo, Goryeo museums, and national myths from Japan to Hungary.
Read →