Four Commanderies of Han

• abstract: The Four Commanderies of Han (漢四郡, 한사군) are Lelang, Lintun, Xuantu and Zhenfan commanderies in northern Korean Peninsula and part of the Liaodong Peninsula. set up by Emperor Wu of the Han Dynasty in early 2nd century BC after his conquest of Wiman Joseon.

以上来源于: WordNet