Chaoyang, Liaoning
Tuoba Gui almost immediately launched a major attack, and in 397, Murong Bao was forced to abandon Zhongshan and retreat back to the old Former Yan capital Longcheng (龍城, a.k.a. Liaodong, in modern Chaoyang, Liaoning), and he would be killed in an internal revolt in 398. Northern Wei took over most of Later Yan's territory, save for a small northern area still controlled by Later Yan and a small southern strip, where Murong De declared himself emperor and established Southern Yan.