Anti-Japanese War: Me! Brutal God of War

"Baga, how did his rifle turn into a heavy machine gun?" "One person took over our headquarters? Where did he get so many weapons and equipment?" "Fuck, that's five thousand tons of gold. You fucking told me it was stolen by a man? How did he take it?" "How is it possible? Why is there not even a hair left in the arsenal?" "God, can you tell me why an armored army suddenly appeared in our heartland?" Travel through the war and gain storage space that can be upgraded. From then on, it became a humanoid weapons arsenal. For the sake of the country and the nation, I am willing to become a demon and kill everyone in the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.