Chapter III: The War of The Brothers For the 9 years after Temujin (Genghis) was defeated by Jamukha, no one knew much because he was lying low with his small family. It was thought he joined the Chins to help fight the Tatars. The Tatars eventually became so weak that they had no choice but to offer themselves as swords for hire to their attackers, the Chins. And like many patterns repeated throughout history, the alliance with the Tatars became their downfall (don't trust someone you used to torment to be your ally).