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Dongbuyeo (86 BCE - 410 CE) was an ancient Korean kingdom that developed from Bukbuyeo, until conquered by the early Goguryeo, which then grew into one of the Three Kingdoms of Korea. According to the Samguk Sagi, it was established when Buyeo's king Hae Buru moved the capital eastward by the sea.
Early Eastern Buyeo
Geumwa became king after Hae Buru's death. Not long after, King Geumwa reversed his father's submission to Bukbuyeo and declared himself "Supreme king" and gave the title posthumously to his father, Hae Buru. At Ubalsu, south of Taebaek Mountain, Geumwa met Yuhwa, the disowned daughter of Habaek, and brought her back to his palace. She was impregnated by sunlight and laid an egg, from which hatched Jumong.
Geumwa's eldest son Daeso became the next King. King Daeso attacked Goguryeo during the reign of its second ruler, King Yuri. Goguryeo's third ruler King Daemusin attacked Dongbuyeo and killed King Daeso. After internal strife, Dongbuyeo fell, and its territory was absorbed into Goguryeo.
Later Eastern Buyeo
According to other records, Jumong was from Bukbuyeo, not Dongbuyeo. According to the Gwanggaeto stele, Dongbuyeo was a tributary of Goguryeo. Dongbuyeo was briefly revived by a small state established around 285 by refugees of Buyeo. This state was conquered by King Gwanggaeto of Goguryeo.