Jolbon Buyeo
Many ancient historical records indicate the "Jolbon Buyeo" (卒本夫餘, 졸본부여), apparently referring to the incipient Goguryeo or its capital city.
In 37 BCE, Jumong became the first king of Goguryeo. Jumong went on to conquer Okjeo, Dongye, and Haengin, regaining some of Buyeo and former territory of Gojoseon.
Read more about this topic: Buyeo Kingdom, History