Zhao Huan, a modern military scholar, woke up from a dream and became a down-and-out captain in the last years of the Yan Dynasty. The dynasty collapsed, the border troops ran out of food, foreign cavalry pressed down on the border, and warlords everywhere gathered their troops to respect themselves. He relied on the knowledge from his previous life to improve military formations, rebuild logistics, and defeat the Beihu vanguard in a sparrow battle, but he was regarded as a thorn in the side of the powerful officials in the DPRK. With the help of the female scout Shen Xiu, the old soldier Chen Du, the son of an aristocratic family Cui Yuanlang, the barbarian protégé Jiang Kui and the daughter of a salt merchant Xie Yaoyin, Zhao Huan started from a small school in the border town, gradually disintegrated the alliance of princes, regained the lost territory, and finally quelled the Hu troubles in the decisive battle in the north and started a new dynasty. But the world is broken, people's hearts are not attached, and the real troubled times have just begun.
