Started as a security team, developed into a heavy armored synthesis division

As a special forces soldier, Xiao Dingfang traveled to the Anti-Japanese War era in a parallel world. After awakening the system, he directly got a 105mm cannon. Sniper rifle? Haha, my sniper cannon has a range of 20 kilometers! Positional warfare? No, I fight an annihilation war! Artillery regiment? No, mine is a heavy-armored synthetic regiment! ...