Ko-gu-ryŭ had been so severely handled by her northern neighbor that she gave up for the time being her plans of conquest in that direction. Instead of this she turned her attention toward her southern neighbor Păk-je whose territory was a morsel not to be despised. About the year 360 she erected a fort at Ch’i-yang not far from the Păk-je capital which was then at Nam-han. Into this she threw a large force consisting of 20,000 infantry and cavalry. They began a systematic plundering of Păk-je. The army of the latter, under the leadership of the Crown Prince, fell suddenly upon this fort and gained a victory, for, when the Ko-gu-ryŭ forces retired, they left 5,000 dead upon the field. Păk-je followed up this victory by throwing up a line of breastworks along the southern bank of the Han river to insure against a future surprise on the part of her unscrupulous northern neighbor. But Păk-je’s victories had shown her the weakness of Ko-gu-ryŭ and reprisals were therefore in order. She equipped an army of 30,000 men and penetrated the country of the enemy. She met no resistance until her army stood beneath the walls of P‘yŭng-yang. An attempt was made to storm the town, during which the king of Ko-gu-ryŭ was mortally wounded by an arrow, but the assault failed and the Păk-je army withdrew in good order. The king of Păk-je, elated over so many evidences of his growing power, promptly moved his capital across the Han River into Ko-gu-ryŭ territory. Some say he settled at Puk-han the great mountain fortress back of Seoul while others say he settled at Nam P’yŭng-yang or “South P’yŭng-yang,” by which is meant the present city of Seoul. Others still say it was at a point a short distance outside the east gate of Seoul. But in spite of the apparent successes of Păk-je it appears that the people were not satisfied. It may be that military exactions had alienated their good will, or it may be that they saw in these ambitious advances the sure presage of speedy punishment at the hands of Ko-gu-ryŭ; but whatever the cause may have been over a thousand people fled from Păk-je and found asylum in Sil-la. The king set aside six villages as their place of residence, and when Păk-je demanded to have them sent back answer was returned that Sil-la could not drive from her borders those who had sought asylum from the ill-treatment of Păk-je.