Traveling Through Jinling, the History Teacher Taught the God-Level Troops

Good news: Time travel to 1937, HiTi system! Bad news: The commander of the defeated army, all his men are old, weak, sick and disabled, and they will go to the battlefield tomorrow! Even worse news: the system is a teaching system, but I am a history teacher who can do nothing but memorize texts! In desperation—— The German armorers from the friendly army came to grab supplies. I bit the bullet and recited the instructions given by the 38-year-old Gai. Result: My new recruits transformed into soldiers in seconds, disassembled and reassembled in three seconds, and scared the elite battalion commander into fleeing. Friendly Army: "... This is unscientific!" My superiors asked me to serve as cannon fodder at the death camp. I found a miner to "ask" me about digging skills. Result: The whole group turned into an infrastructure madman, and the anti-slope tunnel network backhandedly secured a reinforced squadron of the Japanese. Japs: "Baga! Do they grow out of the ground?!" Being chased by Japanese special forces in Nanjing City, I caught a traitor and "learned" a few words in Japanese. Result: Infiltrate the Japanese army camp in the middle of the night, provoke internal strife with words, and let their own people beat their own people. Japs Commander (roaring): "Report! There is a mole among us! No, it's a group of moles!" Me (showing my hands): "Don't ask, asking is just a role model. I've already said I'm just a teacher, why do you always force me to fight?"