Claim: According to the Yongbieocheonga, Yi Seong-gye was never an army general.
Evidence: In a series of military successes, Yi rose to the position of a commanding general in the army. Yi Seong-gye was born in 1335. 
Yi Seong-gye was born in 1335. He had come from a long line of men who had served as government officials familiar with Mongolian customs, he and would later prove to be one of Korea's greatest army generals and kings.