In March 1943, Col. Gen. Heinz Guderian demanded a light tank destroyer to replace all existing "interim solutions" (e.g. Marders ) and towed anti-tank artillery (e.g. 75mm PaK 40 guns). The result of this was the Panzerjager program or G-13. The new vehicle resulting from it was to equip tank destroyer units of infantry divisions. The Panzerkampfwagen 38(t) chassis was chosen as a base for this new Panzerjager. It was first known as "Leichtes Sturmgeschutz 38(t)", then "Jagdpanzer 38(t) fur 7.5cm Pak 39 L/48", and finally "Jagdpanzer 38 Hetzer". It appears that the name Hetzer was not an official name but used by troops and then used in post-war publications. On December 17, 1943, designs were ready and, on January 24, 1944, a wooden mock-up was finished. In March 1944, the first three proto-types were produced by BMM (Boehmish-Mahrische Maschinenfabrik) and it was decided to start production. From March to April of 1944, prototypes were extensively tested, while preparations for production were made at BMM (Praga/CKD-Ceskomoravska Kolben Danek) in Prague and then at Skoda Works at Pilsen.
