The traitor was betrayed, the isolated city was besieged, 30,000 people faced off against 300,000 cavalry, and the food supply could not last for seven days. Guardsman Gu Zhao stood at the top of the city, looking at the dark enemy camp, and smiled. No one knew that this postgraduate student of military history who traveled from modern times had in his mind the secret knowledge of military strategists that had been lost for thousands of years - he extracted the ratio of black powder from the "General Martial Arts", restored the mandarin duck formation from the "New Book of Jixiao", and integrated Qi Jiguang's car camp tactics into this cold weapon era. In the decisive battle tomorrow, he will prove in front of the three armies: War can never be won with more people. Guarding the country, I, Gu Zhao, have the final say!