I Texted My Best Friend, but Accidentally Sent It to the Group Chat

The Strongest Solo-Kill Enemy System in the War of Resistance

Looking for books like The Deadliest Infantry Kill System in the War of Resistance. In a parallel world during the War of Resistance Against Japan, the protagonist has an infantry kill System! If they can ambush the enemy, they never fight head-on; if they can take action, they never waste time talking. Barrett headshots, anti-aircraft cannons fired at ground targets, Vulcan cannons sweeping everything away. Bring it all on.