Ancient Korean history - War in the Three Kingdoms Period. Goguryeo and China's first conflict.

In the 53rd year of King Taejo (105th year), King Taejo led the army to attack the fluctuating counties and prefectures. On the Chinese side, this was a clear invasion of themselves. At that time, county prefectures Yuju, Yodong-gun, and Hyeondo-gun were installed in the Liaodong area, and scholars and Ohhwan-jok were staying. Anyway, feeling threatened by Goguryeo's expansion, Yujusa Temple Punghwan, Hyundo Taesu Yogwang, and Yodong Taesu Chaepung formed an allied force and invaded Goguryeo in the 69th year of King Taejo. Perhaps this was the first large-scale clash between China and Goguryeo, beyond the level of a simple border conflict.   Huhan forces sweep the land of the pulse between fluctuations and domestic castles and pressure Sonobu's territory located down the Yalu River. After Sonobu lost the position of the leader to the Gyerubu, who was the ancestor of Jumong, he became the second-largest tribe in Goguryeo and the largest dissatisfied force. Knowing this situation, Hu Han-gun was secretly expecting the internal division of Goguryeo. However, it was a generous mistake to relax too early. King Taejo's younger brother, Suseong, revealed his intention to surrender (although it was actually a compromise and negotiation on the right line) to make the Later Han army vigilant, and then placed a military at the point to block the Later Han's advance. Then, they make a detour of 3,000 cavalry and launch a bold operation to surprise empty fluctuations and prefectures of Hyeondo. In an instant, two castles are burned down, and 2,000 generous soldiers are exterminated. After being stabbed in the back, Han disbanded the coalition and rushed to protect their base. As a result, Goguryeo succeeds in preventing the invasion of Huhan.   It's not just a success to block, but rather a counterattack in April. Since they disbanded the Huhan coalition, they decided to choose one of them and take a strong blow. Eight thousand allied forces of Goguryeo and the scholars crossed the mountainous area of Liaodong and entered the Haeseong area located on the side of Balhae Bay below Liaodongseong Fortress. As Goguryeo troops moved north from here, the startled Liaodongtaesu led the troops to the south, and the two armies clashed near the nursing home, the middle point between Haesung and Liaodong. Chinese records say that there were only about 100 dead, but the contents show that both Chaepoong and his subordinate staff were killed. Considering that his men threw themselves to protect Taesoo and all of them were killed, it seems that Huhan's Yodong-gun was almost completely wiped out.   However, with this victory, fluctuations did not immediately enter Goguryeo's control. Rather, Goguryeo's ordeal began at this time. Jojo's son, King Jovi of the Wei Dynasty, decided to conquer the fluctuations and dispatched the official prosecutor as Yuju's subsidiary to attack the forces of Gongson, who were based in the Liaodong area. He then dispatched Samarui, the nation's top strategist, to finally destroy the Gongson's forces in 238. Goguryeo faced the border with the Wei Dynasty, and inevitable war clouds began to circulate between Goguryeo and the Wei Dynasty, which regarded the collapse of Gongson as an opportunity to make inroads into the Liaodong.