This is to study the war between Joseon and Yan at the reign of King Zhao in the third century B.C. The Joseon in the war was Kija Joseon. Since Kija Joseon was a feudal state of Old Joseon, it is possible to say that the war against Yan was fought by...
This is to study the war between Joseon and Yan at the reign of King Zhao in the third century B.C. The Joseon in the war was Kija Joseon. Since Kija Joseon was a feudal state of Old Joseon, it is possible to say that the war against Yan was fought by Old Joseon as well.
According to sources, the ruler of Yan dispatched Qin Kai to invade the 2000 li of the western territory of Old Joseon. In addition to Kija Joseon, Jinbeon is also said to have suffered the invasion at that time. Since Jinbeon was also a feudal state of Old Joseon, the central government of Old Joseon could not help but sending their troops to protect Jinbeon.
It has been generally understood so far that Old Joseon lost their western territory of 2000 li and transformed into small state at that time. The border between Joseon and Yan after the war was Manbanhan which is believed to have been about 2000 li east from the original border. But these are wrong. Manbanhan was indeed located rather west from the original border. This leads me to suspect that, due to the counterattack by Old Joseon, Yan relinquished the territory they took to Old Joseon and eventually lost parts of their own territory.
The war between Joseon and Yan was the first great war between the civilization in Northeast Asia (the powers in the Korean peninsula, Liaoxi, and Liaodong) and that of the Yellow River. If Yan really invaded the western territory of 2000 li, they occupied the entire Liaoxi or reached even Liaodong. The damages suffered in the regions from the war must have been very serious.
The indigenous people in present-day Liaoxi (contemporary Liaodong) escaped from the war to Liaodong and neighboring regions including the Korean peninsula, continuing a series migration toward east. This led to a cultural mixture between the refugees and the local populations, giving birth to a new culture.