The German Panzerkampfwagen Neubaufahrzeug, abbreviated as PzKpfw Nb.Fz, series of tank prototypes were a first attempt to create a medium tank for the Wehrmacht after Adolf Hitler had come to power. Multi-turreted, heavy and slow, they were not considered successful, which led to only five being produced. These were primarily used for propaganda purposes and training, though three took part in the Battle of Norway in 1940. Pictures of the Neubaufahrzeuge were displayed with different turret models and orientations to fool allied spies; American and Soviet agents independently reported that the Germans had two new heavy tanks, the Panzer V and VI. In reality, these tanks were far from the Panzer V Panther and the Panzer VI Tiger.

The 7.5 cm KwK 37 L/24 (7.5 cm Kampfwagenkanone 37 L/24) was a short-barreled, howitzer-like German 75 mm tank gun used during World War II, primarily as the main armament of the early Panzer IV tank. Slightly modified as StuK 37, it was also mounted in early StuG III assault guns.