Anti-Japanese War: Kill a Thousand Enemies? I Burned Eight Hundred Mosquitoes!

Lu Ting traveled to a parallel world where war was raging, and became the remnant brigade commander besieged by tens of thousands of elite enemy troops. In a desperate situation, the "Absolute Battle Damage Causal System" is awakened. The battlefield casualty ratio is locked at 0.8:1 What's even more outrageous is that all species can be conferred military ranks!