Gojoseon
Proto–Three Kingdoms of Korea

Numerous small states and confederations arose from the remnants of Gojoseon, including Goguryeo, the Buyeo kingdom, Okjeo, and Dongye. Three of the Chinese commanderies fell to local resistance within a few decades, but the last, Nakrang, remained an important commercial and cultural outpost until it was destroyed by the expanding Goguryeo in 313 CE.

Jun of Gojoseon is said to have fled to the state of Jin in the southern Korean Peninsula. Jin developed into the Samhan confederacies, the beginnings of Baekje and Silla, continuing to absorb migration from the north. The Samhan confederacies were Mahan, Jinhan, and Byeonhan. King Jun ruled Mahan, which was eventually annexed by Baekje. Goguryeo, Baekje, and Silla gradually grew into the Three Kingdoms of Korea that dominated the entire peninsula by around the 4th century.
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