Arc of Gunfire

Wang Zhong came to another world and got involved in the world war in this world.
The plug-in he got is a real-time strategy-like overhead perspective, and he can also see the view of his troops!
So he decisively started micro-manipulation: "Move the machine gun position five centimeters to the left! Place the anti-tank gun in the woods on the right!"
Three years passed like this. Wang Zhong looked at the marshal's scepter in his hand, and then at the double-headed eagle flag behind the emperor's imperial envoy.
"There is an old saying in my hometown, 'Princes and generals should rather have their own kind.' Sir, do you know that?"