1, rushing to send troops, insufficient preparation. At that time, Qidan, as the strongest enemy in the Central Plains, was obviously not suitable for light war without adequate preparation. The Liao army's success mainly focused on the weapon trench. The most important thing is that the battle of Gaoliang River did not give Song Jun soldiers Liao phobia. Most of the reasons for Song Jun's defeat in this war were on Song Taizong, and the fact of Song Jun's fiasco also proved this point.
2. March to attack the city, and the foot soldiers are exhausted. Therefore, the battle of the Sorghum River was fought by Song Jun without will, and the Northern Han Dynasty was destroyed. Song Jun was already a tired teacher, and he was still going to play Youzhou. Song Taizong, an amateur military enthusiast, was once again pitted by Song Jun. In terms of tactical arrangement, Song Taizong almost put all his main forces on the siege of Youzhou City, but Youzhou Yugoslav capital was solid, and Song Jun's main force could not chew this hard bone, and his morale was exhausted by Youzhou, a strong city.
3, according to the fortress, the terrain is unfavorable. In the Battle of Gaolianghe, this was Zhao Guangyi's greatest tactical blunder. If he sends troops to capture the window fortress of Jinzhong, such as Shengshengkou and Gubeikou, while surrounding Youzhou, the defenders of Youzhou will become turtles in a jar, and secondly, according to the risks, the Liao army will be stopped to help, which can achieve the effect of besieging the city. Yelvxiuge's reinforcements arrived, passed through Yanbei fortress, and chose the location of the decisive battle with Song Jun in the Gaoliang River in Ma Pingchuan. The mobility and impact of the Liao cavalry were fully exerted, but Song Jun's foot soldiers had no war and no escape. Is it true? A general will be incompetent and exhausted? .