The Geschützwagen III/IV Hummel, short for 15 cm Schwere Panzerhaubitze auf Geschützwagen III/IV (Sf) Hummel, was a German self-propelled artillery vehicle. As the caliber and weight of field artillery increased, traditional towed guns could no longer keep up with tank divisions on the march. The German command, which was already operating self-propelled guns based on obsolete tank chassis, now needed a vehicle with greater power capable of carrying a heavier howitzer. In 1942, Alkett presented the Geschützwagen III/IV chassis, which combined components of the Pz. III and Pz. IV tanks. Initially, the plan was to install a 105 mm gun on this chassis, but ultimately, they chose the 150 mm sFH 18. Production of the Hummel began in early 1943 at the Deutsche Eisenwerke plant, alongside the Nashorn, and continued until late 1944. More than 700 Hummel SPGs and ammunition carriers based on it were built in total.

The Hummel received its baptism of fire in the summer of 1943 during Operation Citadel, after which it was used by German artillery units until the end of the war. After the war, the French handed over several captured Hummels to Syria, which used them during the Six-Day War of 1967.

The Hummel was introduced in Update 2.57 "Heavy Cavalry". This SPG is equipped with a powerful 150 mm gun capable of destroying most opponents. However, its weak armor prevents the Hummel from being used as a frontline vehicle. Its open fighting compartment also makes it vulnerable to air attacks. Additionally, the SPG has a long reload time and mediocre gun depression.