The Hollow War - Machine Knight

Noble families in the Kingdom of France are expected to send every child but their firstborn son and daughter to the army. To protect them, they spare no expenses and invest in the best equipment the French league of blacksmiths can manufacture. The latest invention is giant motorized suits of thick-plated steel armor. They are incredibly heavy and cumbersome and require an entire entourage of blacksmiths and engineers to repair and maintain in the field, but they offer unparalleled protection a