Guderian’s opposition to the assault gun had eroded with experience. Not only was its frontline utility indisputable, it could be manufactured faster and in larger numbers by less experienced enterprises than the more complex turreted tanks. Guderian correspondingly advocated restoring the panzer regiments’ third battalions and giving them assault guns as a working compromise.
The vehicles he intended were significantly different from the original assault guns and their underlying concept. The mission of supporting infantry attacks had become secondary at best. What was now vital was holding off Soviet armor. The self-propelled Marders, with their light armor and open tops, were well into the zone of dangerous obsolescence. In 1943 the Weapons Office ordered the development of a smaller vehicle mounting a scaled-down 75mm gun on the chassis of the old reliable 38(t). The 16-ton Hetzer (Baiter) was useful and economical, and continues to delight armor buffs and modelers. It was, however, intended for the infantry’s antitank battalions, and did not appear in combat until 1944—one more example of diffused effort that characterized the Reich’s war effort.
On the other hand, the Sturmgeschütz IIIG, with its 75mm L/48 gun, seemed highly suited to tank destruction and was readily available—until Allied bombing intervened. The factory manufacturing the bulk of IIIGs was heavily damaged in late 1943. To compensate, Hitler ordered the available hulls to be fitted to Panzer IV chassis. The result proved practical enough to encourage the production of over 1700 Jagdpanzer IVs by November 1944, despite Guderian’s protest at the corresponding fallout of turreted tanks. The new name of “tank destroyer” suited the vehicles’ new purpose, though their predecessors continued in service under the original title, creating confusion during and after the war that remains exacerbated by the vehicles’ close resemblance.