From the Start, the Northern Barbarians Besiege the City: Then the Corpse Demons Arrive

While the Northern Di besiege the city, I shut myself away to train. When the corpse demons descend, I fight to the death. When the Japanese invade, I draw my blade. As long as I stand, my blade stands, and the city stands. (Apocalyptic survival + heroic city defense + cathartic anti-Japanese action.)