Exiled to the Frontier, I Became the Ultimate Vassal King

Waking up in a new world only to be framed in a honey trap, he is stripped of his status and banished to the desolate frontier to scrape by. While the Emperor plots to confine him in a barren border town and the courtiers wait for his downfall, they underestimate the power of modern knowledge. Armed with advanced science and strategy, he transforms the wasteland into fertile farms, forges refined steel, and trains an elite iron cavalry. Within three years, his unstoppable forces conquer the steppes, and even the princess of a rival empire begs for an alliance. By the time the Emperor realizes the truth, it is too late: the exiled prince was never a discarded pawn, but the true sleeping dragon of the realm. "Your Majesty, this vast frontier... now belongs to me."