Wanyan Heda's Jin army still had more than 100,000 men after the battle at Mount Yu, and the Mongols adopted a strategy of exhausting the enemy. The Jin troops had had little rest all the way from Dengzhou, and had not eaten for three days because of the severing of their supply lines. Their morale was plummeting and their commanders were losing confidence. When they reached Three-peaked Hill, a snowstorm suddenly broke out, and it was so cold...