Conflictc. 402–406

Gwanggaeto Secures Liaodong

King Gwanggaeto fought Later Yan repeatedly and took the Liaodong region, making Goguryeo the dominant power in Manchuria.

After Later Yan seized two Goguryeo fortresses in 400, Goguryeo struck back, attacking Sukgun in 402 and repelling Yan assaults on Liaodong and Mokjeo in 405–406, leaving the land east of the Liao River in Goguryeo hands. The dates rest on Chinese histories and are approximate.

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The map in AD 402

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States and rulers at the time: Goguryeo · victor — King Gwanggaeto the Great

People

King Gwanggaeto the GreatAD 374 – AD 413
monarch · Nineteenth king of Goguryeo, who used the era name Yeongnak, defeated Baekje, saved Silla from Wa and took Liaodong

Before and after

Earlier: AD 400 Goguryeo Rescues Silla
Later: AD 410 Gwanggaeto Subdues Eastern Buyeo