 Go Mosu was a descendant of Haemosu, the founder of Bukbuyeo, or North Buyeo, and was also said to have been a direct descendant or successor to the Emperors of Ancient Joseon (also known as Gojoseon).As a descendant of Haemosu, Jumong was driven by the goal of reuniting all of Gojoseon's ancient territory into one whole empire and one whole nation.With this goal in mind, he set off from Dongbuyeo and began building the foundations for his kingdom.