In 439, Emperor Taiwu of Northern Wei launched a major campaign against Northern Liang and captured both his capital Guzang (姑臧, in modern Wuwei, Gansu) and Juqu Mujian himself.
In 439, Emperor Taiwu of Northern Wei initiated a significant offensive against Northern Liang and seized both their capital Guzang (now Wuwei in Gansu province) as well as Juqu Mujian himself.