Comparing: Wespe vs. Sturmpanzer I Bison vs. G.Pz. Mk. VI (e)

Self-propelled gun on the basis of the outdated Pz.Kpfw. II. The vehicle was designed as a mobile artillery unit for armored forces. The armored cabin with the modified 105 mm field howitzer was mounted on the middle and rear parts of the chassis. This SPG was a successful re-use of the outdated chassis. A total of 700 vehicles were built from 1943 through 1944.

Developed from 1939 through 1940 on the chassis of the Panzerkampfwagen I. Equipped with the 150 mm s.I.G. 33 gun that was mounted together with the gun carriage. Rate of fire was three rounds per minute; on-board ammunition totaled eight shells. The vehicle required the support of an ammunition carrier. The SPG was used from 1940 through 1943 during the French Campaign, Balkan Campaign, and on the Eastern Front. Later the Sturmpanzer II with a similar gun type was developed.

In 1940, German forces captured several light British Mk. VI tanks. The vehicles were redesignated as Leichter Panzerkampfwagen Mk. IV 734(e) and used for training purposes by the Wehrmacht until the fall of 1942. In November, the decision was made to develop a self-propelled gun on the basis of the captured vehicles. In 1942, modifications with a 105 and 150 mm field howitzer were developed. All these SPGs were lost during the defense of France in the summer and fall of 1944.