Slaughtering My Way Through the Republican Era to Save the War-Torn

I transmigrated to the Republic of China era, right in the midst of the fierce War of Resistance Against Japan. At the start, it took six Chinese lives to kill one Japanese soldier. As a Chinese person from the modern era who transmigrated to the Republic of China, how could I put up with that? With the System at my side, I was determined to change those odds.