Division of the Mongol Empire

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Division of the Mongol Empire

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The fragmentation of the Mongol Empire following Möngke Khan's death in 1259.

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Origins & Early Life

The division of the Mongol Empire began after Möngke Khan died in 1259 in the siege of Diaoyu Castle with no declared successor, precipitating infighting between members of the Tolui family line for the title of khagan that escalated into the Toluid Civil War. This civil war, along with the Berke–Hulagu war and the subsequent Kaidu–Kublai war, greatly weakened the authority of the great khan over the entirety of the Mongol Empire, and the empire fractured into four khanates: the Golden Horde in Eastern Europe, the Chagatai Khanate in Central Asia, the Ilkhanate in Iran, and the Yuan dynasty in China based in modern-day Beijing—although the Yuan emperors held the nominal title of khagan of the empire. The four divisions each pursued their own interests and objectives and fell at different times. Most of the western khanates did not recognize Kublai as Great Khan. Although some of them still asked Kublai to confirm the enthronement of their new regional khans, the four khanates were functionally independent sovereign states.

Career & Major Achievements

The Ilkhanate and the Yuan dynasty had close diplomatic relations, and shared scientific and cultural knowledge, but military cooperation between all four Mongol khanates would never occur again—the united Mongol Empire had disintegrated. Möngke Khan's brother Hulagu Khan broke off his successful military advance into Syria, withdrawing the bulk of his forces to the Mughan plain and leaving only a small contingent under his general Kitbuqa. The opposing forces in the region, the Christian Crusaders and Muslim Mamluks, both recognizing that the Mongols were the greater threat, took advantage of the weakened state of the Mongol army and engaged in an unusual passive truce with each other. In 1260, the Mamluks advanced from Egypt, being allowed to camp and resupply near the Christian stronghold of Acre, and engaged Kitbuqa's forces just north of Galilee, at the Battle of Ain Jalut. The Mongols were defeated, and Kitbuqa was executed.

Enduring Legacy & Impact

This pivotal battle marked the western limit for Mongol expansion, as the Mongols were never again able to make any serious military advances farther than Syria. In a separate part of the empire, another brother of Hulagu and Möngke, Kublai, heard of the great khan's death at the Huai River in China proper. Rather than returning to the capital, he continued his advance into Wuchang, near the Yangtze River. Their younger brother Ariq Böke took advantage of the absence of Hulagu and Kublai, and used his position at the capital to win the title of great khan (khagan) for himself, with representatives of all the family branches proclaiming him as the leader at the kurultai in Karakorum. When Kublai learned of this, he summoned his own kurultai at Kaiping, where virtually all the senior princes and great noyans resident in North China and Manchuria supported his own candidacy over that of Ariq Böke.

Chronological Milestones & Life Events

1. 1259: 1259 Milestone — The division of the Mongol Empire began after Möngke Khan died in 1259 in the siege of Diaoyu Castle with no declared successor, precipitating infighting between members of the Tolui family line for the title of khagan that escalated into the Toluid Civil War.
2. 1260: 1260 Milestone — In 1260, the Mamluks advanced from Egypt, being allowed to camp and resupply near the Christian stronghold of Acre, and engaged Kitbuqa's forces just north of Galilee, at the Battle of Ain Jalut.

Historical Fact-Check Quiz: Division of the Mongol Empire

True or False: “The four khanates immediately recognized Kublai as the sole Great Khan after Möngke's death in 1259.”

Answer (FALSE ❌): Most of the western khanates did not recognize Kublai as Great Khan; they functioned as independent sovereign states.

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