U-wi-gŭ was so elated over the victory that he declared that a handful of Ko-gu-ryŭ troops could chase an army of Chinese. Taking five hundred picked cavalry he continued the pursuit; but he had boasted too soon. Gen. Mo Gu-geum’s reputation was at stake. Rallying a handful of his braves the latter turned upon his pursuers and handled them so severely that they turned and fled. The Chinese followed up the timely victory and threw themselves upon the army of Ko-gu-ryŭ so fiercely that the tables were completely turned. It is said that in the engagement that followed Ko-gu-ryŭ lost 18,000 men. King U-wi-gŭ, seeing that all was lost, fled back to his capital and awaited developments. But Gen. Wang-geui, Mo Gu-geum’s associate, pursued the king across the Yalu and gave him no rest until he had fled eastward to the territory of Ok-jŭ on the eastern coast. On his way thither he crossed Chuk-nyŭng Pass where all his remaining guard forsook him and fled. One of his officials, Mil-u, said “I will go back and hold the enemy at bay while you make good your escape”. So with three or four soldiers he held the narrow pass while the king found a retreat in a deep valley, where he succeeded in getting together a little band of soldiers. He offered a reward to anyone who should go and bring Mil-u safely to him. U Ok-ku volunteered to go. Finding Mil-u wounded and lying on the ground he took him in his arms and carried him to the king. The latter was so delighted to recover his faithful follower that he nursed him back to life by his own hand. A few days later the pursuit continued and the king was again hard pressed. A courtier, Yu-ryu, offered to go to the enemy’s camp and in some way stop the pursuit. Taking some food he went and boldly announced that the king desired to surrender and had sent this gift ahead to announce his coming. His words were believed and the general received the gift. But Yu-ryu had concealed a short sword beneath the dishes and when he approached the general he whipped out the weapon and plunged it into the enemy’s breast. The next moment he himself was cut down by the attendants. When the king learned that the pursuers had lost their general he rallied his little force, threw himself upon them and put them to flight. The following year U-wi-gŭ, recognising that his capital was too near the border, decided to remove the court to P‘yŭng-yang which had been the capital for so many centuries. Two years later he made a treaty with Sil-la which remained unbroken for a century. He had been cured of some of his over-ambitiousness. Yŭn-bul was his successor.