Jun was the last king of Gija Joseon.
He was succeeded by Wiman (Wei Man), whose usurpation of the throne began the dynasty of Wiman Joseon of Gojoseon.
[1][2][3][4][5] Wiman entered Gojoseon as a refugee, and submitted to King Jun.
Jun granted Wiman's request to serve as a commander of the western borders.
However, sometime around 194 BC or 193 BC, Wiman led a revolt, and followed Jun down into Mahan territory, which was situated in the southern part of the Korean Peninsula.