Your Majesty, the Northern King's Territory Exceeds the Empire

Thirteen years after transmigrating into a crumbling dynasty, the protagonist discovers a terrifying truth: the Northern King's domain has grown larger than the empire itself. As imperial authority weakens and regional warlords rise, he must navigate treacherous court politics, military intrigue, and the looming threat of a vassal more powerful than the throne. Can he reclaim imperial supremacy before the kingdom fractures beyond repair?