A variant of the iconic Panzer IV, the Sturmpanzer IV Brummbär (SdKfz 166, Sturmgeschütz IV für 15cm StuH 43) was a German self-propelled assault gun. Work on the design began in 1942 with a goal of creating a vehicle well suited for the demands of urban warfare. The gun was based on the PzKpfw IV Ausf. E and F and, later, Ausf. G. Initially, the vehicle carried 15 cm StuH 43 howitzer, which was later replaced by a 15 cm StuH 23/1 L/12 weapon. The Brummbär went into production in 1943 and its first use was in Operation Citadel around the Kursk salient. Eventually, units equipped with this assault gun defended the Anzio and Normandy landings and participated in the Warsaw Uprising.
In total, 300 vehicles were built during the war, with 4 remaining survivors. The drawings in this publication are based on the vehicle at the Kubinka Tank Museum near Moscow.