In the second year of Zhenguan, it was getting dark. Li Shimin approved the memorial all afternoon and stood up to stretch his shoulders. The guilt over the incident at Xuanwu Gate had long since disappeared, but the Turks took advantage of the situation and brought an army of 300,000 to the Wei River to force him to sign a treaty, which made him panic. The generals put forward a lot of opinions, but none of them satisfied him. How to fight? He had to think about it.