Korean History › Three Kingdoms
Baekje
18 BC (traditional) – AD 660· Empire, kingdom or state· Rulers & states
Mostly agreedGood evidence; some details, dates or numbers uncertain.
The southwestern kingdom, founded near today's Seoul, known for refined art and close ties with China and Japan; conquered in 660.
See it on the Korean History map →What happened
Tradition says Onjo, a son of Goguryeo's founder, established Baekje (백제) on the Han River in 18 BC; earthen walls of its capital survive in Seoul's Songpa district. Growing out of Mahan, it peaked under King Geunchogo in the 300s. Goguryeo's capture of Hanseong in 475 forced moves south to Ungjin (Gongju) and, in 538, Sabi (Buyeo). Baekje traded by sea with southern China and Yamato Japan. Silla and Tang destroyed it in 660.
Why it matters
It was a cultural bridge, passing Buddhism, writing, architecture and craftsmen to Japan, where its influence on early Japanese civilization was deep.
How we know
Samguk sagi and Chinese and Japanese histories; Pungnap Fortress, King Muryeong's intact tomb (found 1971) and a gilt-bronze incense burner; UNESCO Baekje Historic Areas (2015).
Still debated
Its true founding date and reach are uncertain, including Chinese texts' disputed claim that Baekje once held land in western Liaoning.
Inside this (3)
Connections (6)
▸Buyeo was a claimed ancestor of BaekjeMostly agreed
The connection
Baekje's founder Onjo was said to be Jumong's son, making Baekje a grandchild of Buyeo. Its royal surname was Buyeo, its kings kept a shrine to the founder Dongmyeong, and in 538 King Seong renamed the state Nam Buyeo, 'South Buyeo', at his new capital Sabi.
When and how
Han River region, traditionally 18 BC; the claim was stressed in a 472 letter to the Northern Wei and in the 538 renaming.
How sure are we?
The Samguk sagi, the royal surname, and King Gaero's 472 letter to the Northern Wei stating that Baekje and Goguryeo both came from Buyeo.
Debates and open questions
Whether Baekje's ruling house truly came from the north or adopted the ancestry for prestige is debated; most of its people were Mahan locals.
▸King Jangsu of Goguryeo took Hanseong from BaekjeWell documented
The connection
Jangsu's southward push peaked in 475, when he led 30,000 troops against Baekje's capital Hanseong, in today's southeastern Seoul, took it after a short siege and executed King Gaero. Baekje's court fled south and rebuilt at Ungjin (Gongju), and Goguryeo held the Han River region for about 75 years.
When and how
475, at Hanseong, near the Pungnap and Mongchon earthen fortresses in Seoul's Songpa district.
How we know
The Samguk sagi and Japan's Nihon shoki both record it; Goguryeo forts and artifacts found around Seoul, as on Achasan, confirm the occupation.
Debates and open questions
Exactly where Hanseong's palace stood, and how far south Goguryeo's control reached, are still debated.
▸King Geunchogo of Baekje brought a golden age to BaekjeWell documented
The connection
Under Geunchogo, Baekje reached its greatest extent, from the Han River south through former Mahan lands, and briefly pressed into Goguryeo. He fixed father-to-son royal succession, opened ties with Eastern Jin and Yamato, and ordered an official history: the moves of a confident, centralizing monarchy.
When and how
Hanseong, near today's Seoul, 346–375.
How we know
The Samguk sagi's Baekje and Goguryeo annals, both recording the 371 Pyongyang campaign, and the Jin shu's record of his 372 envoy.
Debates and open questions
The exact borders he controlled, especially in the far southwest, are uncertain and partly reconstructed from Japanese sources.
▸Fall of Baekje ended BaekjeWell documented
The connection
With its capital taken and King Uija sent to China in 660, Baekje ended as a state. Tang ruled its land through commanderies, and a revival war failed in 663. Silla took over the territory from 671, and many Baekje nobles and craftsmen fled to Japan.
When and how
660–663, in the Baekje heartland around Buyeo, Gongju and the Geum River.
How we know
Chinese, Korean and Japanese records agree; Japan's Nihon shoki records large groups of Baekje refugees settling there.
Debates and open questions
How much Baekje identity survived under Silla is debated; it resurfaced when Gyeon Hwon founded Later Baekje in 892.
▸King Jinheung of Silla seized the Han River valley from BaekjeWell documented
The connection
In 551 Silla and Baekje jointly drove Goguryeo from the Han River basin, and Baekje regained its old heartland downstream. In 553 Jinheung turned on his ally and seized it. Baekje's King Seong counterattacked and was killed at Gwansan Fortress in 554, poisoning relations for a century.
When and how
Han River basin around today's Seoul, 551–554; King Jinheung and King Seong; the battle at Gwansan, near Okcheon.
How we know
Samguk sagi annals of both kingdoms; Jinheung's monument on Bukhansan, near Seoul, marks his hold on the region.
Debates and open questions
Whether Silla planned the betrayal from the start, and the exact sequence of moves in 551–553, are debated.
▸Samhan: the Mahan, Jinhan and Byeonhan confederacies included the Mahan statelet that became BaekjeMostly agreed
The connection
Baekje began as Baekje-guk, one of Mahan's 54 statelets, on the Han River. Strengthened by northern immigrants, it absorbed its neighbors one by one, and by King Geunchogo's time in the 4th century it had swallowed most of Mahan.
When and how
Han River basin around Seoul, 1st–4th centuries AD; some southwestern Mahan chiefdoms may have lasted into the 5th–6th centuries.
How sure are we?
The Records of the Three Kingdoms lists Baekje among Mahan's statelets; Mahan-style jar burials persist in South Jeolla, showing gradual absorption.
Debates and open questions
When Baekje fully absorbed Mahan, in 369 or more than a century later, is debated, especially for the Yeongsan River region.