Ere long came reports of new and terrible ravages by the Japanese along the southern coast, especially at Nam-hă, Ko-sŭng, Kö-je and Ul-ju, while at Fusan they stole a large number of Korean boats. A garrison had been stationed in the south to be used in just such emergencies, but it had been used for so many different things that it could not be concentrated upon any given point; so levies were made on the common people. These levies went under the name of Yŭn-ho-gun, or “Smoke-house Soldiers” because from every house where smoke was seen arising a man was requisitioned. At the same time the governor of Chŭl-la Province advised the establishment of a horse relay system, but the suggestion was not acted upon. At this time the king lost the services of Gen. Yi Whan-jo who died at his post. His son, Yi Sŭng-gye, better known by his title Yi T‘ă-jo, stepped into his father’s place. At the very beginning of his martial career an opportunity presented itself for him to perform a signal service for the king. A certain Pak Eui deemed that the time was ripe for an insurrection and he began to take steps in that direction, but the king sent the young general, Yi T‘ă-jo, against him and the little blaze was promptly stamped out. As a consequence the young man was confirmed in the position of military governor of the north and east, and under his command was placed a large body of troops. And now there burst upon the country another storm of fire and blood. The “Red Heads” had been gaining ground rapidly and were now ready to take their revenge for the terrible reverses they had suffered during the previous invasion. They crossed the Yalu 200,000 strong under the leadership of generals Pan-sŭng Sa-yu and Kwan Sŭng-săng. The king promptly sent Gen. Yi Pang-sil against them and hastened to swell the army to as high a point as possible, The officials and monks and other people of means brought horses or provisions, while the walls of Song-do were guarded with jealous care.