The Kingdoms of Korea

Season 2, Episode 6: The Kingdoms of Korea
Heaven Lake atop Baekdu Mountain, located in modern-day North Korea, where the mythical founder of Gojoseon was born. Source: Bdpmax / CC BY-SA (http://creativecommons.org/licenses/by-sa/3.0/)
After the 108 BCE conquest of Gojoseon. The southernmost purple commandery is Lelang, which would later be divided and Daifung Commandery created. Source: Xakyntos / CC BY-SA (http://creativecommons.org/licenses/by-sa/3.0/)