Jumong (The tale of King Dongmyeong of Goguryeo's childhood and upbringing as a warrior) is LIT, yo...
Jumong's father and mentor, the Blind Master Haemosu, was killed by two princes and half-brothers of Jumong just to spite him, as the two princes, then ruling the defacto Gojoseon state under the administration of the Chinese Imperial Han Dynasty, had enriched themselves to astronomical extent by collaborating with their brutal Chinese overlords and was furious that Jumong wanted freedom from the Han commanderies and instead rule Korea by the will of it's people.
Jumong (Prince Dongmyeong) and his band of highly proficient rebel guerrillas take on the forces of the Imperial Han Commandery of Zhenfan, killing the Han general with a single shot in the process and throwing the regional Han forces into disarray.