In 918, Wang Kŏn overthrew Kung Ye, who had been the ruler of Taebong, and established Goryeo. Gyeongmyeong joined forces with him in 920, and their allied armies were able to repel a Later Baekje assault on Daeya Castle.[1] However, after this many border commanders chose to desert Silla in favor of Goryeo, so Gyeongmyeong was left no better off than before.[2]
King Gyeongmyeong sought to get aid from Tang China, and sent missions bearing tribute, but was unsuccessful.
After his death in 924, King Gyeongmyeong was buried to the north of Hwangboksa temple and the throne was passed to his younger brother, King Gyeongae of Silla.