Along with Baekje and Silla, Goguryeo was one of the Three Kingdoms of Korea. It was an active participant in the power struggle for control of the Korean peninsula and was also associated with the foreign affairs of neighboring polities in China and Japan.
The Samguk Sagi, a text from the 12th century in Goryeo, claims that Goguryeo was founded in 37 BC, but today the date of the dynasty's foundation is in doubt, as archaeological evidence suggests that Goguryeo was founded before Silla, and four things support this:
Kim Pu-sik was a 12th-century historian and author of the Samguk sagi (History of the Three Kingdoms). Since he was a descendant of the Silla royal family, it is likely that he distorted history to show the superiority of his ancestor, Silla, and this is undeniable.[17]
Since Kim Pu-sik wrote the History of the Three Kingdoms at least 5 centuries after the events of the Three Kingdoms and was not an eyewitness to the events of that era, his book is considered a secondary source and cannot be considered a primary source alone.[18]
Goguryeo was one of the great powers in East Asia[29][30][31] until its defeat by a Silla–Tang alliance in 668 after prolonged exhaustion and internal strife following the death of Yeon Gaesomun.[32] After its fall, its territory was divided between the Tang dynasty, Later Silla and Balhae.
The name "Goryeo" (alternatively spelled "Koryŏ"), a shortened form of Goguryeo (Koguryŏ), was adopted as the official name in the 5th century,[33] and is the origin of the English name "Korea".[34]
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^디지털 삼국유사 사전, 박물지 시범개발. 문화콘텐츠닷컴. Korea Creative Content Agency. Archived from the original on 19 November 2018. Retrieved 6 February 2017.
^Callahan, William A. (2012). China: The Pessoptimist Nation. Oxford University Press. p. 114. ISBN978-0-19-960439-5. On the Korean side, Koguryo is central to national identity: the name "Korea" comes from this ethnic Korean kingdom.
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