Armament and vehicles become obsolete quickly in war. This is caused by rapid development of both new types of weapons and defenses. This can be seen in the history of WW2. It's easy to see progress if you compare what the belligerents were using at the start of the war and what they were using in 1945. This applied to all aspects of the tanks: chassis, engines, observation devices, armour, and of course the armament. Tank armament evolved rapidly during the war. This evolution was directly linked to the growth of armour protection. Early war tanks could be defeated with a heavy machine gun, but towards the end gunners had to crack open mobile pillboxes with 150-200 mm of armour. This required rapid development of anti-tank guns.
|76 mm ZIS-5 gun with ballistics of the F-22, summer of 1941. The gun went into production with USV (F-34) ballistics.
|Penetration ability of the 76 mm 3-K AA gun. However, these trials were not carried out entirely correctly, and so did not show the real ability of the gun.
|Document dated September 16th ordering the development of S-53 and S-54 guns.
|The S-54 was based on the F-34.
|This lineage allowed the gun to easily be installed in a T-34 tank.
|T-34 tank with an S-54 gun, November 1943.
|Trials showed that the gun had quite satisfactory penetration.
|Maximum gun deperssion.
|Installation in the T-34's turret.