Pursuing their quarry energetically, the Mongols kill…

Pursuing their quarry energetically, the Mongols kill the Western Xia emperor in a mountain fortress.

His son takes refuge in the great walled city of Ningxia, which the Mongols had failed to conquer in earlier wars.

Leaving one-third of his army to take Ningxia, Chinggis sends Ogedei eastward, across the great bend of the Huang He, to drive the Jin forces from their last footholds north of the river.

With the remainder of his troops, he marches southeast, evidently to eastern Sichuan Province, where the Western Xia, the Jin, and the Song empires meet, to prevent Song reinforcements from reaching Ningxia.

Here he accepts the surrender of the new Western Xia emperor but rejects peace overtures from Jin.