After winning a time-travel lottery and placing a lottery, he actually returned to the time of fighting on the battlefield. This battle was still known as the "death knell of the Tang Empire". It was Yang Guozhong's second conquest of Nanzhao for his own selfish desires.
The protagonist emerges from desperation to turn this war into victory, and step by step reaches the peak of his life. Jiedushi may not be necessary, and the position of the emperor seems to be good...
Look at how a mortal man looked around in the Tang Dynasty!