Military Decline of the Liao Dynasty

Timeline

1. 1114Achuhu River · HeilongjiangWanyan Aguda formally rose against Liao, issuing a proclamation denouncing the Liao and calling on the tribes to join; the Jurchen army won against the odds, quickly controlling key positions on the upper Songhua River as the Liao's northeastern military system began to collapse.
2. 1114Ningjiangzhou · JilinLiao general Xiao Sixian led troops to meet the enemy but was badly defeated at Ningjiangzhou; the battle marked a severe decline in Liao field-battle capability, and garrisons across the northeastern prefectures lost morale, surrendering or fleeing.
3. 1114Chuhedian · HeilongjiangEmperor Tianzuo personally campaigned, sending Yelu Zhangnu and others with an army of 700,000 (the recorded figure may be exaggerated) to Chuhedian, where a night attack routed them; the Liao main force suffered grievous losses and could never again effectively recover the lost northeast.