The wild Nap-t‘ap-chul having been so successful in their first venture, now once more entered Koryŭ territory and as the general sent against them was not able to check their advance Gen. Yi T‘ă-jo was appointed to this place. The enemy was encamped in Hong-wŭn in Ham-gyŭng Province. Gen. Yi attacked them there and routed them with a loss of 1,000 men. Near Ham-hung they made a stand and defended themselves desperately, but he soon had them in full flight once more. Taking 600 picked cavalrymen he pursued them to Ch‘a-ryăng Pass and secured another victory. Only one of the enemy fought well. This man fought aways in front of Gen. Yi. The latter feigned flight to draw him on and then suddenly turning attacked his pursuer and laid him low with an arrow from his unerring bow. The women who followed the camp of the invading army came out and taunted the men saying “You have overcome everyone but these Koryŭ people; them you cannot conquer. You had better retreat and make for home.” The enemy called a truce and told Gen. Yi that they had come not to attack Koryŭ but the “Red Heads.” This was a mere ruse to save time. Gen. Yi knew this and drawing an arrow to the head shot one of the leaders of the enemy through the body. At last he gave orders to his archers to shoot the horses from under the enemy. This decided the battle and the Nap-t‘al-chul sued for peace. In recognition of these services the king appointed him general of all the forces in the north. The general then proceeded to annihilate all the colonies and settlements of the obnoxious Nap-t‘ap-chul throughout the entire north, and having placed them where they belonged, showed them that their only hope was in making a lasting treaty with Koryŭ. This they were quite willing to do. As the king came slowly north toward the capital the officials urged that Song-do was too small for the capital and too near the sea to be well protected from the Japanese corsairs. They therefore urged him to remain for a time at Ch‘ŭng-ju, and he gave consent. And now, strange to relate, Quelpart, at the instigation and under the leadership of Ho-dok-ko Pul-wha, who had been stationed there three years before to take charge of the horse-breeding industry, revolted from the sway of Koryŭ and became at least nominally a part of the Yuan empire. In order to reward the soldiers who had done such good work in the north the king levied a special tax on the people which they gave with such poor grace that they called it the “tax without reason.” In 1362 the emperor of China, led to it by the empress, whose seditious relatives had forfeited their lives in Koryŭ, proclaimed one Hye, called Prince Tok-heung, a relative of the king, as king in his place. But Koryŭ well knew that the old time power of the Mongols was gone and so prepared to resist the order.