Why Couldn't the Mongols Conquer India, Egypt, Japan or Vietnam?

The Mongols built the largest contiguous empire in history. They took Beijing, Baghdad and Kyiv. But at four edges of their map they went to war again and again and never conquered a thing: Egypt, Japan, Vietnam and India. On one living map, edge by edge: the Mamluk horsemen at Ain Jalut in 1260, the wall at Hakata Bay that stopped the 1281 landing before the typhoon struck, the stakes hidden under the tide in the Bach Dang River in 1288, and the sultan of Delhi who fixed the price of grain to keep an army big enough to beat them. Then the answer: what these four had that Beijing, Baghdad and Kyiv did not. (Vietnam later paid Kublai tribute in name, and Mongol raiders held parts of the Punjab for a time, but none of the four was ever annexed.) Out of respect, the film shows no casualties: battles appear as marks where they were fought, sacks as dated stamps, and no place is marked where a named person died. CHAPTERS 0:00 Four Places the Mongols Never Took 0:39 1260: The Spring of Goliath 4:37 1274: The Wall at Hakata 8:13 1285: Stakes in the River 11:19 1303: The Price of Grain 14:41 1259: Where the Grass Ran Out 16:34 1526: A Mongol Name Rules India SOURCES Borders: keyed by Thousand Year Map from K. Spruner von Merz and H. T. Menke, Hand-Atlas für die Geschichte des Mittelalters und der neueren Zeit (1880), W. R. Shepherd, Historical Atlas (1923) and C. Joppen, Historical Atlas of India (1907), public-domain plates, over Natural Earth admin-1 units (public domain); checked against Cliopatria (Bennett et al., Scientific Data 12, 247 (2025); Seshat Global History Databank), CC BY 4.0. All borders approximate; areas measured on an equal-area projection. Places: Wikidata (CC0). Base map: Natural Earth (public domain; coasts and rivers are modern). Close-ups of Hakata Bay and the Bach Dang estuary: Contains modified Copernicus Sentinel data 2026 (modern coastlines). The wall's line at Hakata and the stake fields at Bach Dang are drawn by hand: the wall's line is approximate, the stake fields are schematic. Grasslands: today's grasslands (IGBP class 10) from NASA MODIS land cover, 2023 (MCD12Q1, via NASA GIBS; public domain), shown as a guide to the medieval steppe. Texts: The Book of Ser Marco Polo (trans. Henry Yule, 3rd ed. rev. Henri Cordier, 1903); Ziauddin Barani, Tarikh-i Firoz Shahi, in H. M. Elliot and J. Dowson, The History of India as Told by Its Own Historians, vol. 3 (1871); Hulegu's letter to Louis IX (P. Meyvaert, Viator 11, 1980); the History of Yuan (paraphrased); Encyclopaedia Britannica; Wikipedia. PHOTOS AND VIDEO Public domain: Moko Shurai Ekotoba (the Mongol invasion scrolls of Takezaki Suenaga), c. 1293, Museum of the Imperial Collections, https://commons.wikimedia.org/wiki/Fi... CC0: "Wood Stakes Used to Destroy Mongol Fleet at Bach Dang, 1288" by Gary Todd (Vietnam Military History Museum, Hanoi), https://commons.wikimedia.org/wiki/Fi... Licensed (cropped and framed): the defence wall's site at Ikinomatsubara, Fukuoka, by Hirho, CC BY-SA 4.0, https://commons.wikimedia.org/wiki/Fi... Licence: https://creativecommons.org/licenses/.... Our edits of CC BY-SA photos are shared under the same licence. Music: Epidemic Sound ("Allegro Sotto Le Stelle", Trevor Kowalski; "Trail of Crumbs", Martin Landstrom; "Designated Heroes", Arylide Fields; "Letting Go", Gavin Luke; "Coco Begins His Journey", David Celeste; "Gavotte des Papillons", Dian Shuai; "Firework Fanfare", Ruiqi Zhao). Sound effects: Epidemic Sound; pen and paper sounds: Freesound (CC0). WATCH NEXT 600 Years of Ottoman History in 24 Minutes:    • 600 Years of Ottoman History in 24 Minutes   Corrections: none yet. If you spot an error, tell us in the comments; we correct it here and pin the fix. Thousand Year Map: whole histories of countries and empires, told on one living map. #history #mongolempire