Those Days When I Was a Lord in the Magical World

This was an era when imperial power and religious power coexisted. The rules of the old days were to use bloodline, magic talent and fighting spirit level to distinguish superiority and inferiority. While others were practicing magic, Allen used "fertilizer" and "crop rotation" to detonate food production and make famine a historical term. While others memorized spells by rote, he used "fluidics" to improve canals, and "architecture" to design bastions to make his territory impregnable. While others advocated personal force, he used modern management systems to reorganize the army, engraving discipline and collectiveness into the bones of every soldier.