Some of the background information for the Mongols conquest of the Jin Dynasty was that the Jin had the support of the steppe tribes which had caused some rivalries between the tribes. The Mongols had gotten together under the rule of Khabul Khan. But they were torn apart by the Jin. The Jin had gotten the Tartars to invade the Mongols. The Tartars had finally captured the Mongols leader, Khabul, and they handed him over the the leaders of the Jin. He was eventually nailed to a mule.
In 1210 Genghis Khan was the new ruler of the Mongols. They ended up claiming