Lelang Commandery

Lelang Commandery
Chinese name
Traditional Chinese	樂浪郡
Simplified Chinese	乐浪郡
Transcriptions Standard Mandarin Hanyu Pinyin Lèlàng Jùn
Korean name
Hangul	낙랑군 락랑군
Hanja	樂浪郡
Transcriptions Revised Romanization Nangnang-gun Rangnang-gun McCune–Reischauer Nangnang-kun Rangnang-kun

Transcriptions
Standard Mandarin
Hanyu Pinyin	Lèlàng Jùn

Transcriptions
Revised Romanization	Nangnang-gun Rangnang-gun
McCune–Reischauer	Nangnang-kun Rangnang-kun

Lelang was one of the Chinese commanderies which was established after the fall of Wiman Joseon in 108 BC until Goguryeo conquered it in 313. Though disputed by North Korean scholars, Western sources generally describe the Lelang Commandery as existing within the Korean peninsula, and extend the rule of the four commanderies as far south as the Han River (Korea). However, South Korean scholars assumed its administrative areas to Pyongan and Hwanghae region.

In 108 BC, Emperor Wu of the Han dynasty conquered the area under King Ugeo, a grandson of King Wiman. The Emperor set up Lelang, Lintun, Xuantu and Zhenfan, known as the Four Commanderies of Han in the northern Korean peninsula and Liaodong peninsula. The Book of Han records Lelang belonged to Youzhou, located in northwestern Gojoseon consisted of 25 prefectures, 62,812 houses, and the population was 406,748. Its capital was located Nakrang-guyok, P'yŏngyang. (Rakrang 樂浪/락랑 is a district in central P'yŏngyang today.)

After Emperor Wu's death, Zhenfan and Lintun were abolished and Xuantu was moved to Liaodong. Some prefectures of the abolished commanderies were incorporated into Lelang. Lelang after the consolidation is sometimes called "Greater Lelang commandery". Since Lelang became too large, the Defender of the Southern Section (南部都尉) was set up to rule the seven prefectures which formerly belonged to Zhenfan. Before that, the Defender of the Eastern Section (東部都尉) was set up to rule former Lintun's seven prefectures.

...
Wikipedia