Yangmen***

In the early years of the Northern Song Dynasty, Emperor Taizong of the Song Dynasty went on a personal expedition to destroy the Northern Han Dynasty and end the division of the Five Dynasties and Ten Kingdoms. The Northern Han Dynasty was allied with the Liao Kingdom, and relied on the famous general Yang Ye to resist. After a fierce battle, the Liao army retreated, the Northern Han Dynasty was destroyed, and Yang Ye surrendered. Emperor Taizong of the Song Dynasty made great efforts to expedition to the sixteen states of Yanyun that were occupied by the Liao Kingdom. In the battle of Gaoliang River, the Song army was defeated, and Taizong fled south in panic, but Yang Ye was the savior. The following year, the Liao State sent troops to attack Yanmen Pass. Yang Ye was ordered to guard and defeat the Liao army. From then on, the Liao army called Yang Ye "Yang Wudi" and would avoid or flee when they saw the Yang family's army flag. The soldiers were strong, and Song Taizong once again thought about attacking Liao...