Tank guns can hit targets several kilometers away at most.

At the limit of 5km, tank guns pursue armor-piercing ability, services and arms cooperate, and long-range guns undertake fire suppression tasks. The main energy of a tank is to destroy enemy armored targets, so its artillery is a cannon, which has a straight trajectory, accurate close attack, high muzzle velocity and is easier to exert its power. Accordingly, its accuracy and power to targets 5 kilometers away will plummet. If the tank is too omnipotent, it can do anything, but nothing.

Demand leads to