History Lives - Gojoseon Series: Episode 9: Clash with Yeon - The International Situation in East Asia in the 4th Century BC

1. This historical series examines how Gojoseon lost 2,000 ri of western territory around 300 BC after an attack by Yeon general Jin Gae, retreating from Liaoxi to Liaodong.
2. After Gojoseon adopted the title of king in 323 BC, the Weilüe records that Jin Gae seized more than 2,000 ri and set the border at Manbeonhan.
3. Views differ on the location of Manbeonhan: some place it in the Cheonsan Mountains of Liaodong, while the traditional view places it at the Cheongcheongang River; the next episode is Episode 10, Wiman's coup.

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