Lord: Just After Crossing, the Troops Exploded in Desperate Situation

He traveled through time and became the weakest lord. His territory was barren, with only three remaining soldiers and half a bag of moldy wheat left. The barbarians came to the city and shouted that they would use my skull as a drinking bowl. I used my backhand to awaken the explosive system. Others rely on tactics to fight battles and I rely on explosive soldiers. Others rely on gold coins to build cities, but I rely on explosive soldiers. Since then, a group of steel legions have been raised.