Exiled to the Wasteland, I Built an Empire with the Help of the System

Transmigrated into the body of a prince, only to be banished to a wasteland where even grass can't grow? No problem! As a top engineer, knowledge is power! Barbarian cavalry are strong? Sorry, my Maxim machine gun emplacements will handle any challenge! Enemy city walls are formidable? Men, bring up my 800mm "Staff of God" cannons! The Western Papacy wants to cause trouble? My steel fleet has arrived at port; even Jesus couldn't stop them, I'm telling you! Starting with burning cement and smelting steel, I'll build a super empire on this wasteland, a empire whose technology crushes the entire world!