May 5
Kublai Khan Elected Great Khan of Mongol Empire
Kublai Khan's unanimous election by a kurultai assembly at Shangdu resolved a contested succession and redirected the Mongol Empire's center of power toward China.
Summary
Following the death of his brother Möngke Khan in 1259, Kublai Khan, grandson of Genghis Khan, faced a contested succession within the vast Mongol Empire. While campaigning against the Song Dynasty in China, Kublai learned of his brother's passing and rival claims by another brother, Arigböge. A kuriltai assembly convened at Shangdu in southeastern Mongolia, where Kublai's supporters unanimously elected him Great Khan on May 5, 1260. He immediately proclaimed his rule in a Chinese-language edict and began consolidating power, eventually establishing the Yuan Dynasty that ruled China. The election ended a period of uncertainty but sparked a civil war with Arigböge that lasted until 1264.
Context
The Mongol Empire, forged by Genghis Khan's unification of steppe tribes in 1206, had grown into a vast domain stretching across Eurasia through successive conquests. Leadership passed among Genghis's sons and grandsons, with kurultai gatherings of Mongol nobles determining the next Great Khan. Kublai, born in 1215 as the second son of Tolui and the capable Sorghaghtani Beki, received early administrative responsibilities in northern China under his brother Möngke, who ascended as Great Khan in 1251.
What Happened
While leading campaigns against the Southern Song Dynasty in China, Kublai learned of Möngke Khan's death in 1259. His younger brother Ariq Böke, based in the Mongol heartland, advanced a competing claim to the throne. Kublai's supporters among the Mongol elite convened a kurultai at Kaiping, later known as Shangdu in southeastern Mongolia. On May 5, 1260, the assembly elected Kublai as Great Khan. He promptly issued a proclamation of his accession in Chinese, asserting authority over the empire's eastern territories.
Aftermath
The election immediately ignited the Toluid Civil War between Kublai and Ariq Böke. Kublai leveraged his control over Chinese resources and military forces to prevail by 1264, though the conflict permanently fractured unified Mongol rule. He began relocating his administrative focus eastward, adopting elements of Chinese governance while retaining Mongol military structures.
Legacy
Kublai's reign completed the conquest of China with the fall of the Song in 1279 and formalized the Yuan Dynasty in 1271, marking the first time a non-Han ruler governed all of China proper. His synthesis of Mongol and Chinese traditions facilitated expanded Silk Road exchanges, influenced later dynasties' approaches to Inner Asia, and established a model of imperial administration that endured in East Asian history.
Why It Matters
Kublai's ascension shifted the Mongol Empire's center of gravity toward East Asia and facilitated the integration of Chinese administrative practices with Mongol traditions. His reign completed the conquest of China and promoted cultural exchanges along the Silk Road, influencing Eurasian trade and governance for generations.
Related Questions
Why did Kublai face opposition after his election?
His younger brother Ariq Böke contested the kurultai's decision, leading to a four-year civil war that divided Mongol loyalties.
What role did Chinese practices play in Kublai's rule?
Kublai adopted Chinese administrative methods and issued proclamations in Chinese to govern his vast territories effectively.
How did the 1260 election affect the broader Mongol Empire?
It accelerated the empire's fragmentation into separate khanates, with Kublai's power centered in East Asia rather than the steppes.
Who was Kublai's most important early supporter?
His mother, Sorghaghtani Beki, provided political guidance and helped prepare her sons for leadership roles.
When did Kublai complete the conquest of China?
The Yuan forces defeated the last Song resistance in 1279, bringing all of China under Mongol control for the first time.
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Sources
- Kublai Khan | Biography, Accomplishments, & Facts, Encyclopædia Britannica. Accessed 2026-07-10.
- Kublai Khan - Wikipedia, Wikimedia Foundation. Accessed 2026-07-10.