The Emperor Wants Me on the Throne

After transmigrating into a forgotten prince, Prince Adrian spends eight years guarding the desolate frontier of Blackridge. Every year, he sends desperate pleas for money to the imperial court while secretly using modern knowledge to revolutionize farming, industry, and weaponry, transforming the wasteland into the empire's richest territory. When Emperor Magnus visits in disguise, Adrian's carefully crafted act begins to unravel.