In which 1187 battle was Genghis Khan defeated by Jamukha?

In which 1187 battle was Genghis Khan defeated by Jamukha? The answer is the Battle of Dalan Baljut. The battle was fought in 1187 between Jamukha and Temüjin, the future Genghis Khan, near the Onon River. Jamukha won decisively, forcing Temüjin to flee and beginning a long, bitter rivalry between the two former blood brothers.

The conflict reflected competing political visions. Jamukha defended the privileges of Mongolia’s traditional aristocracy, while Temüjin attracted followers through a more merit-based system that rewarded loyalty and ability. Their disagreement became a struggle for leadership over the Mongol tribes.

The battle is sometimes called the Battle of Dalan Balzhut, an alternate transliteration of the same name. Strictly speaking, Temüjin was not yet universally known as Genghis Khan in 1187; that title came later, in 1206. The quiz uses his better-known later name for clarity.

After the victory, Jamukha’s brutal treatment of captives reportedly alienated potential supporters and helped shape later loyalties in the steppe.