Sturmgeschütz III
The Panzer III was intended to be the main medium core of the German armored force when it was designed during the inter-war period. While it was originally designed to fight other tanks, its 37 mm and later 50 mm guns could not keep pace with Soviet T-34 and KV tanks, which, respectively, either had sloped armor or relatively thick armor, and both shared 76 mm guns. By 1941, the Panzer III was the most numerous of German tank designs. However, during the later parts of 1943, it was largely replaced by later versions of the Panzer IV and Panzer V "Panther". Its assault gun chassis variant, the Sturmgeschütz III, was, with just over 9,400 units built, the most widely produced German armored fighting vehicle of World War II.