Cannon fire arc

Wang Zhong arrived in an alternate world and became embroiled in this world's global war. What he gained was a cheat, akin to a real-time strategy game's overhead perspective, and he could even see through the eyes of his subordinates' units! So, he decisively started micro-managing, "Shift the machine gun position five centimeters to the left! Place the anti-tank cannon in the forest on the right!" Three years passed in this manner, and Wang Zhong looked at the marshal's baton in his hand, then at the double-headed eagle flag behind the emperor's envoy. "In my hometown, there's an old saying, 'Princes and generals, are they not sprung from the masses?' Envoy, do you know of it?"