Transmigrating to a Magical World to Become the Iron Queen

I was the empire's most good-for-nothing princess, cast off by my father to govern a barren, freezing wasteland. Everyone expected me to come crawling back in tears and marry whoever they chose. Instead, armed with modern knowledge, I opened coal mines, smelted high-grade steel, and built railways. When the empire was hit by a tide of demons and knights' swords and mages' spells were driven back at every turn, my iron dragons thundered across the battlefield. My father named me his heir, the Church hailed me as a holy maiden, and the crown prince of a rival nation offered his realm as a betrothal gift. I turned them all down and crowned myself emperor. As the crown settled on my head, I said softly, “Knowledge is the greatest power of all.”