Three-Thirds of the World's Ghost-Killing Operation

In ancient times, the world was divided into three factions. Only the Taiyi dynasty, only the devil returns to the clan, and only a modern country. 100 Years ago, the Battle of Wuding occurred, and a hundred-year non-disturbance treaty was signed. The Taiyi Dynasty was destroyed, the Mogui clan's vitality was severely damaged, and the modern country dominated the world. But now that a hundred years have passed, the demons have returned, and the Taiyi Dynasty will surely make a comeback, then what will be the outcome of the world?