acy. Propelled by gunpowder, the iron ball relied solely on a small amount of gunpowder and its own momentum after leaving the barrel to inflict damage. As for their power, they were essentially just...ingji region to assist in the defense. Please allow us passage."Hu Shifan let out a cold snort and said, "The Dusi is a local military system. The imperial court has never set a precedent for deployin...