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The Sturmgeschütz III (StuG III) was an assault gun produced by Germany during World War II. It was the most-produced fully tracked armoured fighting vehicle , [ 4 ] and second-most produced German armored combat vehicle of any type after the Sd.Kfz. 251 half-track .
The 7.5 cm KwK 40 (7.5 cm Kampfwagenkanone [a] 40) was a German 75 mm Second World War era vehicle-mounted gun, used as the primary armament of the German Panzer IV (F2 model onwards) medium tank and the Sturmgeschütz III (F model onwards) and Sturmgeschütz IV assault guns which were used as tank destroyers.
Meanwhile, heavier armed tank destroyers were developed, such as the Jagdpanzer IV and the Jagdpanther, which combined the low silhouette of the StuG with the heavier armament of the Panther and Tiger II tanks, respectively. Still, the StuG III was an effective armored fighting vehicle long after the Panzer III had been retired as a main battle ...
It was designed as a close-support infantry gun firing a high-explosive shell (hence the relatively short barrel) but was also effective against the tanks it faced early in the war. From March 1942, new variants of the Panzer IV and StuG III had a derivative of the 7.5 cm PaK 40 anti-tank gun, the longer-barreled 7.5 cm KwK 40. [1]
An assault gun (from German: Sturmgeschütz, lit. ' storm gun ', meaning "assault gun") [1] [2] is a type of armored infantry support vehicle and self-propelled artillery, mounting an infantry support gun on a protected self-propelled chassis, [3] intended for providing infantry with heavy direct fire support during engagement, especially against other infantry or fortified positions ...
Between 16 and 17 December 1943, Hitler was shown the StuG IV and approved it. To make up for the large deficit in StuG III production StuG IV production was now given full support. From December 1943 to May 1945, Krupp built 1,111 StuG IVs, in early 1944 Alkett built 30 Stug IVs using new Panzer IV chassis sent from Nibelungenwerk.
The 7.5 cm KwK 40 (75x495mm) used in tanks had a fixed cartridge case twice the length of that used by the 7.5 cm KwK 37, the short barrelled 75 mm used on earlier tanks, and the 7.5 cm Pak 40 cartridge was a third longer than that used by the KwK 40. The Pak 40 used a percussion primer, while the vehicle mounted 75 mm guns used electrical primers.
Encyclopedia of German Tanks of World War Two: The complete illustrated directory of German battle tanks, armoured cars, self-propelled guns, and semi-tracked vehicles, 1933–1945. London: Silverdale Books. ISBN 1-84509-012-8. Niehorster, Leo (1990). German World War II Organizational Series; Volume 3/I: Mechanized Army Divisions (22 June 1941 ...