Han dynasty When
Old Chosŏn was defeated in 108 BCE, three commanderies were established in its place:
Lelang,
Lintun, and
Zhenfan. In 107 BCE,
Xuantu Commandery was also established in the place of Gojoseon's ally,
Yemaek. In 82 BCE, Lintun was absorbed into Xuantu and Zhenfan absorbed into Lelang. In 75 BCE, Xuantu moved its capital to
Liaodong due to resistance from the native people. Lintun was transferred to Lelang. Although often depicted as special administrative units within the Han dynasty, excavated records suggest that these commanderies were governed no differently than those in the core regions of the Han. Neighboring Korean powers such as the
Jinhan confederacy and
Byeonhan confederacy imported goods from Lelang such as mirrors. As the natives started to adopt the culture of the Han dynasty, a hybrid of different cultures that was unique to Lelang developed in the 1st and 2nd centuries CE.
Gongsun Du, Kang, Gong, and Yuan Gongsun Du was born in
Xiangping (
Liaoyang,
Liaoning). In his early years, Du's father fled to
Xuantu Commandery, where Du became an office runner. Du attracted the support of the governor Gongsun Yu, whose daughter he eventually married. He rose up the ranks of officialdom in
Ji Province until he became regional inspector. Gongsun Du was appointed Administrator of
Liaodong Commandery by
Dong Zhuo in 189 on the recommendation of
Xu Rong. As a result of his lowly origins, Du harbored an intense hatred for the elite landowning class. Once he became administrator, Du carried out his vendetta against the wealthy by publicly flogging to death the Magistrate of Xiangping and extirpating the gentry. Du dominated the northeast and expanded into the territory of
Goguryeo and the
Wuhuan. When Cao Cao attempted to bestow titles upon Du, he rejected them and proclaimed himself king. Du died in 204 and was succeeded by his son,
Gongsun Kang. However this is not reported in the Chinese records, which state that the invasion was a success and Balgi was settled in conquered territory. K.H.J. Gardiner says that this is because the
Samguk Sagi sought to reverse the reality of defeat in a number of instances and questioned both the existence of Gyesu and his victory. Gongsun Kang took some territory in 209 and Goguryeo was forced to move its capital further east to the
Yalu rivery valley near
Hwando. Kang died in 220 when his children were too young to rule, so his brother
Gongsun Gong succeeded him. Gong maintained his independence, albeit while accepting titles issued by
Cao Pi. Gong became ill and was replaced by his nephew
Gongsun Yuan in 228. Yuan ruled independently until
Sima Yi invaded in 238 and annexed his territory. Goguryeo re-established in its former territory and established dominance over the tribes at the mouth of the Yalu River sometime before 233. In 238, Goguryeo allied with
Cao Wei to overthrow the Liaodong regime. Afterwards, the Lelang, Daifang, and Xuantu commanderies were ruled by Cao Wei, the Jin dynasty, and the
Murong Xianbei until they were conquered by Goguryeo in the early 300s.
Goguryeo Lelang Commandery was ruled by the
Jin dynasty (266–420) until 313. Due to civil war, the Jin dynasty was unable to send officials to govern its territory in northern Korea. The leaders of Liaodong and Lelang led over one thousand households to break away from Jin and submitted to the
Xianbei warlord of
Former Yan Murong Hui. Murong Hui relocated the remnants of the commandery to the west within Liaodong. Goguryeo attacked and annexed the commandery in 313. Daifang was conquered in 314-315 and Xuantu in 319. ==Revisionism==