Zhao Yang was caught off-guard by the two-pronged assault from Yan Xun and Chu Qiao. The Southwestern Army, the Northern Alliance, and the Batuha Army were utterly defeated. Zhao Yang, now isolated, retreated towards Helan Mountains. Yan Xun followed tightly on his tail, killing over 200,000 enemies in the process, eliminating the main forces of all the armies except Zhao Yang's Southwestern Army. Yan Xun had led his forces all the way into the northwestern mainland of Xia, to Yanming Pass. Subsequently, the Black Eagle Army set up camp at Beian Camp, located near Yanming Pass. Zhao Yang looked across the river, seeing that the northwestern part of the royal capital had been occupied by the troops of Yan Bei, while the nobles and officials there had surrendered. In a fit of anger, he spit out a mouthful of blood onto the frozen river.