Baekje and Goguryeo joined forces to attack Silla, although they were eventually driven back when Silla received aid from Tang Dynasty China. In 660, when a huge united army of Silla and the Chinese invaded Baekje, General Gyebaek organized 5,000 soldiers of the highest morale and courage to meet them in battle. He knew before he set out that his army was outnumbered and that his efforts would be futile, but he did not hesitate to try to defend his country, reportedly stating "I would rather die than be a slave of the enemy." He then killed his wife and family to prevent them from falling into the hands of opposing forces, and to prevent the thought of them to influence his actions or cause him to falter in battle.
His forces won four small initial battles, but then he was forced to move his forces to block the advance of General Kim Yu-shin on the Baekje capital, Buyeo. The two generals met on the plains of Hwangsan Field, in present day Hamyang, near Chiri Mountain. Gyebaek's forces fought bravely but they were outnumbered ten to one and, in the end, he and his men were annihilated.
The reason why mountain fortresses are concentrated to the east of Nonsan is that the Nongang field unfolds in Nonsan and Gangyeong from the ending point of the east mountain area and Buyeo follows on the west. If they could not defeat the enemy there, they would not have had any choice because there are no other significantly high mountains until Buyeo.
In the era of Baekje’s Sabi, Duikanseong (Castle) was in Nonsan, playing a significant role in defending the capital Sabi along with Hwangsanseong (Mountain Fortress), Mochoni-ri Mountain Fortress, Hwanghwa Mountain Fortress and Noseong Mountain Fortress and it also served as an important site in terms of politic, economic, cultural and military aspects. As seen in the map, large and small mountain fortress are concentrated in Nonsan region. Especially, in the east area, Hwangsanseong (Mountain Fortress), Cheongdong-ri Mountain Fortress, Mountain Fortress, Oiseong-ri Mountain Fortress, Sinhuing-ri Mountain Fortress, Sanjik-ri Mountain Fortress, Dali Mountain Fortress and Maehwa Mountain Fortress including Noseong Mountain Fortress gathered. Among them, the last one was the central mountain fortress from which many remain were left unburied. The reason why mountain fortresses are concentrated to the east of Nonsan is that the Nongang field unfolds in Nonsan and Gangyeong from the ending point of the east mountain area and Buyeo follows on the west. If they could not defeat the enemy there, they would not have had any choice because there are no other significantly high mountains until Buyeo. After all this mountain fortress is assumed to have been constructed during the Baekje era.
General Ge-Baek was the last general of Baekje...
The area of Hansamcheol-ri, Beolgok-myeon is the historic site of this Hwangsalbeol battle, in which General Gyebaek and his 5,000 soldiers fought with General Kim Yu Sin and his 50,000 soldiers. It is said that the blood and sweat of the Baekje and Silla soldiers formed the stream of three valley around Hansamcheon. Later people called this place Hansamcheon with the meaning of three streams of deep resentment.