If Ko-gu-ryŭ flattered herself that her troubles were all over she was wofully mistaken. With the opening of spring the Emperor’s determination to humble her was as strong as ever. All the courtiers urged him to give over the attempt. They had seen enough of Ko-gu-ryŭ. The Emperor, however, was firm in his determination, and in the fourth moon another army was launched against the hardy little kingdom to the east. It crossed the Liao without opposition but when it arrived at Tong-whang Fortress, near the present Eui-ju, it attempted in vain to take it. The Emperor decided therefore to make a thorough conquest of all the Liao-tung territory and delimit the possessions of Ko-gu-ryŭ as far as the Yalu River, To this end siege was laid to the Fortress of Liao-tung. After twenty days the town was still intact and the Chinese seemingly as far from victory as ever. Ladders were tried but without effect. A bank of earth was thrown up as high as the wall of the town, but this too failed. Platforms of timber were erected and rolled up to the wall on trucks of eight wheels each. This seemed to promise success but just as the attempt was to be made fortune favored Ko-gu-ryŭ, for news came to the Chinese that an insurrection had arisen in China, headed by Yang Hyŭn-gam. The tents were hastily struck and the army by forced marches moved rapidly back towards China. At first the Ko-gu-ryŭ forces thought this was a mere feint but when the truth was known they rushed in pursuit and succeeded in putting several thousands of the Chinese braves _hors de combat_. The following year the Emperor wanted to return to the charge but an envoy came from Ko-gu-ryŭ offering the king’s humble submission. To this the Emperor replied “Then let him come in person and present it.” This he would not do. Four years later the king of Ko-gu-ryŭ died and his brother Kön-mu assumed control. It was in this same year 618 that the great T’ang dynasty was founded on the ruins of the Sui and the fear of vengeance was lifted from Ko-gu-ryŭ. She immediately sent an envoy to the T’ang court offering her allegiance. Păk-je and Sil-la were only a year behind her in paying their respects to the new Emperor. As a test of Ko-gu-ryŭ sincerity, Emperor Kao-tsu demanded that she send back the captives taken during the late war. As the price of peace Ko-gu-ryŭ complied and sent back 10,000 men. The next year the T’ang Emperor conferred the title of royalty upon all the three kings of the peninsula which, instead of settling the deadly feud between them, simply opened a new and final scene of the fratricidal struggle. To Ko-gu-ryŭ the Emperor sent books on the Shinto faith, of the introduction of which into Korea we here have the first intimation.