The original Panzer IV Ausf A model was introduced in 1937, and it was built around several common components with the Panzer III, including the same engine. The 25-tonne tank was the brainchild ...

The Stug III Ausf.B employed 50 mm frontal armor and 30 ... the solution was a Stug III superstructure mounted on a Panzer IV J-chassis. The Stug IV carried an improved 7.5 cm assault cannon ...