I was a tycoon in World War I: Starting to save France.

Many readers do not understand why the article uses a tank with two guns, the "Char B1".

This is actually determined by the fact that there were no dedicated tank guns in World War I.

Tanks usually have two requirements, one is to be used for anti-tank and the other is to cooperate with infantry attacks.

The former requires the tank gun to be flexible and have a large firing angle, and the rotating turret can perfectly meet this requirement.

The latter requires caliber.

Small-caliber artillery cannot cause much damage to enemy earthworks or bunkers, and large-caliber is obviously more lethal.

However, in World War I, it was impossible to install large-caliber artillery in the turret, otherwise it would be impossible to aim or even load because the breech block was too long.

Only by shortening the breech block and developing a dedicated tank gun can the two be unified.

Before that, the only layout that could meet both needs of tanks at the same time was the "Char B1".

Even in World War II, there were still tanks with this layout, the American M3 medium tank (Seven Brothers Coffin), because the breech block was not shortened in time and there was no suitable tank gun, so it could only be put into battle with this layout.

Otherwise, it is very likely that the tanks will encounter indestructible enemy fortifications on the battlefield, causing serious problems such as being unable to advance or retreat.