Goguryeo

Goguryeo or Koguryo was an ancient kingdom located in southern Manchuria, southern Russian Maritime province, and the northern and central parts of the Korean peninsula. Along with Baekje and Silla, Goguryeo was one of the Three Kingdoms of Korea. Goguryeo was an active participant in the power struggle for control of the Korean peninsula as well as associated with the foreign affairs of peer polities in China and Japan.The Samguk Sagi, a 12th century CE Goryeo text, indicate that Goguryeo was founded in 37 BCE by Jumong, a prince from Buyeo, although there is archaeological and textual evidence that suggests Goguryeo culture was in existence since the 2nd century BCE around the fall of Gojoseon, an earlier kingdom that also occupied southern Manchuria and northern Korea. It was a major regional power of East Asia until it was defeated by a Silla-Tang alliance in 668 CE. After its defeat, its territory was divided between the Tang Dynasty, Unified Silla and Balhae; some of the territory might have also been taken by the Khitan, still in tribal form at this point.
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