828 CEJang Bogo establishes a garrison at Cheonghae, the Cheonghaejin fortress is constructed.
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788 CE: Probable birth of Jang Bogo, the powerful Silla warlord and merchant.
828 CE: Jang Bogo establishes a garrison at Cheonghae, the Cheonghaejin fortress is constructed.
828 CE - 846 CE: Jang Bogo commands the Silla garrison at Cheonghae.
839 CE: Jang Bogo supports Kim Ujing in taking the throne of the Unified Silla kingdom.
846 CE: Jang Bogo is assassinated in a Silla aristocratic conspiracy.