淵蓋蘇文
Yeon Taejo's position of "Magniji" was given to Eulji Mundeok, and eventually to Yeon Gaesomun. The position of Daedaero of the Eastern province was also given to his eldest son. Yeon Gaesomun later led a coup that overthrew Go Geon-mu, who had become the 27th Taewang of Goguryeo. Yeon Gaesomun led Goguryeo through one last period of glory before its fall in 668 at the hands of the Tang-Silla Alliance.