Background
With increasing Allied air dominance in the European Theater in World War II, German armored forces found themselves in need of mobile and survivable anti-aircraft defenses to cover and protect their operations on all fronts. Originally equipping wheeled and half-tracked vehicles as self-propelled anti-aircraft platforms, the requirement for a more robust solution was quickly recognized. The solution came in the form of salvaged chassis from damaged Panzer IV variants retrofitted with anti-aircraft armament. One of the final variants to see combat operations was the Flakpanzer IV "Ostwind" (“East Wind”). The Ostwind’s single rapid-firing 3.7cm Flak 43 and increased armor was a marked improvement over its “Wirblewind” predecessor’s quad 2 cm mount. Of the 100 Ostwinds originally ordered, only 44 were completed by March 1945.