As the ruler of the arms empire, Tang Mo found himself unexpectedly falling and entering a completely different world, where he fortuitously acquired a king of arms system. In this primitive world, Tang Mo utilized the powers bestowed upon him by the system to advance the development of the entire realm. After all, the ambition of civilization to conquer serves as the catalyst for its advancement. Life has perpetually evolved through the cycles of attack and defense for millions of years… So, selling assault rifles to these archers and training knights to act as tankers… that should be no issue, right?