長壽王代 高句麗의 西方進出과 그 境界

Abstract

In 436, Goguryeo advanced to Helong, the capital of the Northern Yan dynasty, and confronted the Northern Wei Dynasty at the border of Dalinghe and Yiwulu Mountain. Furthermore, Goguryeo planned on advancing into Didouyu in 479 and take half of its territory while also moving into Eastern Mongolia. Goguryeo accepted the Northern Wei occupation of Helong, the capital of the Northern Yan, while the Northern Wei reciprocated by recognizing that Goguryeo controlled the area east of Dalinghe and Yiwulu Mountain. This is clearly known from the Book of Wei, because there is nowhere east of Dalinghe that can be misgoverned. There are traces of Goguryeo occupation of the area east of Dalinghe such as the Goguryeo fort of Muryeora and inscriptions on graves that recognize the area to the east as controlled by Goguryeo. This argument is supported by the fact that King Jangsu(長壽王, 413-491) sent twenty thousand Goguryeo soldiers to the capital of the Northern Yan Dynasty in 436 A.D. It is important to note that the families of ten thousand people from the Northern Yan continued to reside in Goguryeo, which indicates that the Goguryeo soldiers in 436 A.D. were a permanent occupation force. Also, a Buddhist sculpture from Goguryeo was discovered in Yixian of Liaoxi with an inscription that stated ‘Dae Goguryeo guk'. In conclusion, this paper argues that King Jangsu advanced in 436 against Helong and with that advance, occupied the area east of Dalinghe and Yiwulu Mountain. In 479, Goguryeo planned on advancing into Didouyu. It is clear that Goguryeo possessed the territory east of Dalinghe since 436, and so through the Goguryeo advance toward Liaoxi, important historical events can be understood.