The Four Khanates and the Breakup

Genghis Khan died in 1227 having conquered the largest connected land empire ever assembled, stretching from China to the edge of Europe. Mongol custom did not pass that whole territory to one son. Instead it got divided among sons and grandsons, each given a share of land and people to rule. For a while a supreme khan still held nominal authority over everyone. But the empire was too big to run from one capital, and every time a supreme khan died, rival grandsons with their own armies and territories had reason to fight for the top job instead of cooperating. Within two generations those regional shares hardened into four separate states: the Yuan Dynasty in China and Mongolia, the Ilkhanate in Persia and the Middle East, the Chagatai Khanate in Central Asia, and the Golden Horde in Russia and the steppe.

Each khanate's rulers adapted to the people they governed. Ilkhanate and Golden Horde khans converted to Islam. Yuan emperors patronized Tibetan Buddhism and Chinese court rituals. That religious change was personal and practical, a way to govern local populations more easily, not a sign the Mongols dissolved into those cultures. Each khanate kept its own Mongol dynasty, its own military, and full independence from the others.

That independence had a cost. The four khanates increasingly treated each other as rivals, even going to war, especially the Ilkhanate and Golden Horde over the Caucasus. Yet even divided and quarreling, they still controlled the roads linking China, Persia, and Russia, which is why the next idea in this unit is the Pax Mongolica: one connected network of trade and travel surviving even after its political unity broke apart.