Awakening the Fiefdom System, I Build a Heavy Combined-Arms Brigade on the Frontier!

From the start, Ren Tianxing had nothing but a bed. Then he awakened the Mandate of Heaven System. The larger his territory, the better the rewards. Hmph, what kind of rewards could there be? Holy crap! Blueprints for DF-series intercontinental ballistic missiles? Holy crap! Blueprints for J-series stealth fighters? Holy crap! Blueprints for nuclear-powered aerospace carriers? H-how am I supposed to handle this? My fascinating ancestors had no idea how vast the world was, but I do! Step one: Ride across Tokyo and admire the cherry blossoms! Step two: March north! North America is north, too!