Meanwhile Ko-gu-ryŭ had been pushing her conquests steadily. Kă-ma and Ku-da, two northern districts or “kingdoms” were absorbed and other conquests were contemplated. The Emperor beheld these enlargements of Ko-gu-ryŭ with some concern and in 27 A.D. sent a strong force to bring her to terms. At the first encounter the forces of Ko-gu-ryŭ were routed and fell back toward the capital which, as we have seen, was then at or near the present town of Eui-ju. The king hastily summoned a council of war at which it was decided to man the walls of the capital and try to hold out until the enemy should be compelled by lack of food or the severity of the weather to raise the siege. The Chinese knew that there was little water within the wall and had high hopes of compelling a speedy surrender. This was all too true and there was soon much distress in the city; but a certain courtier said “If you will give me all the fish in the city I will undertake to make the enemy raise the siege or I will pay the penalty with my life.” He was given permission and soon he had the soldiers along the wall going through the motions of a bath, using fish scales for water. The scales glittered in the sun like drops of water and the enemy supposing that there must therefore be a good store of water in the city despaired of taking it by siege and so struck their tents and returned to China.
The marked difference between Ko-gu-ryŭ and Sil-la was well illustrated by the events of this year. While Ko-gu-ryŭ was reaching out covetous hands in every direction and carrying fire and sword into the hamlets of inoffensive neighbors, Sil-la was pursuing a course of such good will to all both without and within her borders that natives of the wild tribes to the north of her came in large numbers and settled on her soil, glad to become citizens of so kind and generous a land. The king himself made frequent tours of the country alleviating the distress of widows, orphans and cripples. It was in 32 B.C. that he changed the name of the six original families which united in founding Sil-la. The men of Yang-san, Ko-hŭ, Tă-su, Ul-jin, Ka-ri, and of Myŭng-whal were named respectively Yi, Ch’oé, Son, Chöng, Pă and Sŭl. These names will be recognised at once as among the most common patronymics in Korea at the present day, which adds confirmatory evidence that Korea of to-day is essentially the Korea of the south. When we add to this the fact that the names Pak, Kim, An, Ko, Sŭk, Yang, So, Sŭ, Kwŭn, Pă, Im, Na, Hyŭn, Kwak, Ho, Whang, Chang, Sim and Yu originated in southern Korea the argument becomes well-nigh conclusive. The only names of importance that did not originate in southern Korea are Min, Song, Om, Cho, and Han; and many of these originated in what must have been Ma-han territory. At the same time the king established seventeen official grades and called them respectively I-bŭl-son, I-ch’ŭk-son, I-son, P’a-jin-son, Tă-a-son, A-son, Kil-son, Sa-son, etc.