Military Service, from Impostor to World Hegemony

[Overhead - Time Travel - No System] There are nine states in the world. If they are united for a long time, they will be divided. If they are divided for a long time, they will be united. The court was in turmoil, the people were in dire straits, and famine spread across the land. I changed my son and ate, but I saw the rich family singing and dancing. Bandits emerged, established themselves on their own, and divided Kyushu... Until that destined man appears, reorganizes the Nine Provinces, defeats the barbarians, and rules the world!