Emperor Taizong of Song - Military Campaigns - Second Campaign Against Liao Dynasty

Second Campaign Against Liao Dynasty

After the death of Emperor Jingzong of Liao in 982, the 12-year-old Emperor Shengzong of Liao ascended to the throne of the Liao Dynasty. As Emperor Shenzong was too young to rule the kingdom, Empress Dowager Xiao became the regent. Emperor Taizong decided to launch the second campaign against Liao in 986, following the advice of his subjects.

Emperor Taizong remained in Kaifeng and directed the war there without personally entering the battlefield. He split the army into three sections – East, Central and West. The East Army was led by Cao Bin, the Central Army by Tian Zhongjin and the West Army by Pan Mei and Yang Ye. All the three armies would attack Yanjing from three sides and capture it. The campaign was termed as the Yongxi Northern Campaign as it took place in the third year of the Yongxi reign of Emperor Taizong.

The three armies scored some victories initially but they became more divided later as they acted individually without co-operation. Cao Bin took the risk by attacking without the support of the other two armies. He succeeded in taking Zhuo Prefecture but the lack of food supplies forced him to retreat. As there was miscommunication between the three armies, the East Army attacked Zhuo again. However, this time, Empress Dowager Xiao and Yelü Xiuge each led an army to support Zhuo. The East Army was inflicted with a crushing defeat and almost completely destroyed.

Emperor Taizong was aware that the failure of the East Army would affect the entire campaign and he ordered a retreat. He ordered the East Army to return, the Central Army to guard Ding Prefecture and the West Army to guard four prefectures near the border. Following the defeat of the East Army, the Liao army led by Yelü Xiezhen attacked them as they retreated. The West Army led by Pan Mei met Yelü Xiezhen's army at Dai Prefecture and faced another defeat at the hands of the Liao army. The two commanders of the West Army started to argue about retreating. Yang Ye proposed that they should retreat since the East and Central Armies had already lost the advantage following their defeats. However, the other generals on Pan Mei's side began to doubt Yang's loyalty to Song as Yang Ye used to serve Northern Han. Yang Ye led an army to face the Liao troops but they were trapped and Yang committed suicide eventually. Pan Mei was supposed to arrive with reinforcements to support Yang but he failed to do so.

Emperor Taizong ordered another retreat following the Song armies' defeats by Liao's Yelü Xiuge and Yelü Xiezhen. The failure of the second campaign was attributed to the miscommunication between the three armies and their failures to operate together. Besides, Emperor Taizong had also restricted the decisions of his generals as he had arbitrarily planned the whole campaign on Liao and his generals had to adhere to his orders strictly. These failures led to internal rebellions which were crushed swiftly.

In 988, the Liao armies led by Empress Dowager Xiao attacked the Song border again. Emperor Taizong did not order a counter-attack and merely instructed the troops to defend firmly.