From History Geek to Crown Prince: Love, Politics and War in an Isekai

He studied history to understand the past. Now he must survive using it. A brilliant mind trapped in the wrong century, he died knowing war only from books. Reborn into a crumbling kingdom in another world with nothing but a crown and an execution list, he faces a different world torn by ambition, deceit, and the raw brutality of conquest. Armed with the tactics of Sparta, the discipline of Roman Legion, the cunning of Napoleon, the strength of Alexander the Great and the steel nerves of a commander who’s read too many wars to lose his own, he builds an army from ash. Dwarven engineers, battle-scarred veterans, and untested youths—he molds them into the iron shield of a fading realm. But victory breeds enemies. Peace tempts betrayal. And in the court where every smile hides a dagger, even love becomes a weakness he can’t afford. He doesn’t seek glory—he fights to survive. He doesn’t crave power—he needs the strength to protect what’s left. But war doesn't care what a man wants. It only takes. When the smoke clears, will he be remembered as a reformer, a tyrant… or just another name swallowed by the blood-soaked pages of history? This isn’t a hero’s journey. THIS IS A HISTORY GEEK RECKONING.