Xue was a brave general in Tang Dynasty, and there were many movies and TV plays about him. His life is full of legends. He joined the army in the early Tang Dynasty and made great contributions in many battles. In the past ten years, he has made great achievements. He defeated the nine surname Tiele, surrendered to Koguryo, defeated the Turks, "Three Arrows Set Tianshan Mountain", "Bravely Take Liaodong", "Benevolent Administration of Korea" and "Benevolent Administration of Korea". With this meritorious military service, Xue died at the age of 70, from the official to the governor of Gua, the right governor and the general Wei, and served as a captain on behalf of the country.

Xue's life is full of legends, but he was also defeated and exiled from office. This battle is a defeat. At that time, the Tubo kingdom wanted to control the western regions of the Tang Dynasty, so it invaded the battlefield of Dafeichuan, and Xue led the army to crusade. Tang Jun is going to Wuhai when he reaches the south of Dafeichuan. Xue's opponent said: Wuhai terrain is dangerous. If you want to pass here, you must whip your horse and pass here quickly. I will lead the army to advance quickly and destroy the enemy before they are prepared. You will send reinforcements quickly.

In this way, Xue successfully defeated the pioneer of the Tubo army, and when Guo came, Guo was arrogant and slow to March, and was attacked by the enemy. In the end, he suffered a fiasco. Knowing this news, Xue had to retreat to Dafan, but in the face of the enemy's attack of 400 thousand, Xue's army still didn't win. Finally, he withdrew all the troops and Xue was dismissed.

So, why didn't Xue, who has rich combat experience all his life, win the war?

First of all, the place of Wuhai is 4000 meters above sea level. Soldiers have altitude sickness, and the marching speed is very fast, so soldiers have dizziness, vomiting and other symptoms, and their combat effectiveness is reduced. Secondly, Guo disobeyed orders and acted without authorization, resulting in the trench being destroyed by the enemy. Xue had no choice but to quit. Finally, the strength of the enemy and ourselves is very different, with only 50,000 in Tang Jun and 400,000 in the Tubo army.

Although Xue was dismissed from office in the Great Africa-Sichuan War, his reputation remained the same, so he was reopened in 68 1 year, which defeated the Turks and did not disappoint Li Zhi.