In 663 the Emperor conferred upon the king of Sil-la the title of Tă-do-dok of Kye-rim.
It appears that when the Chinese retired from before P‘yŭng-yang and left the Sil-la forces in such a delicate position, some of the Chinese were allowed to remain there on the plea that if all were removed it would invite an outbreak of the Păk-je revolutionists. Now as the year 663 opened the Emperor reinforced them by a powerful army under Gen. Son In-sa. Sil-la also sent the flower of her army under command of twenty-eight generals to join the Chinese before P‘yŭng-yang. But the plan of operations was changed. It was decided to move southward and complete the subjugation of the troublesome Păk-je patriots and their Japanese allies. The combined Chinese and Sil-la armies marched toward Chu-ryu fortress where the revolutionists were supposed to be intrenched. On their way they met the Japanese disembarking, on the banks of the Pak River. They were put to flight and their boats were burned. The march was continued and the fortress was duly invested. It fell straightway and the pretender to the Sil-la throne was captured. This was followed by the surrender of all the revolutionists and their Japanese friends. The last fortress to fall was that of Im-jon, now Tă-heung, after a desperate struggle.
The war was now at an end. The dead were buried, a census was taken of the people in the Păk-je capital, aid was given to the poor, and the people were encouraged to return at their peaceful avocations. Expressions of satisfaction at what seemed to be the return of peace were heard on all sides.
Gen. Yu In-gwe, who had been left in charge of the Chinese troops before P‘yŭng-yang when the Emperor ordered the retreat, now sent word to the Chinese capital that as his soldiers had been in the peninsula two years without seeing home he feared they might mutiny. He received orders to return to China with his men but he decided to wait till the grain that his men had sown should ripen. The Emperor then appointed Pu-yŭ Yung the brother of the last king of Păk-je to the position of governor of all the territory formerly embraced in Păk-je. He received the title of Tă-do-dok of Ung-jin, and was urged by the Emperor to govern well. This was in 664.