The SdKfz 124 Wespe (German for wasp) or (Leichte Feldhaubitze 18 auf Fahrgestell Panzerkampfwagen II) was a German self-propelled artillery vehicle developed and used during the Second World War. It was based on the Panzer II tank.In 1940, during the Battle of France, it was apparent that the main tank of the German forces, the Panzer II, was unsuitable as a direct combat vehicle; though mechanically sound, it was both under-gunned and under-armoured. Thus, when the need arose for a self-propelled artillery vehicle, the Panzer II was a natural choice, removing the vehicles from front line service and extending their usable lifespan.The design for the Wespe was produced by Alkett, and was based on the Panzer II Ausf. F chassis. Production of the vehicles was carried out at various plants, mainly in Poland. The conversion process itself proved relatively simple, involving the replacement of the Panzer II turret with a 105 mm howitzer and gun-shield.The Wespe first saw combat in 1943 on the Eastern Front, and proved so successful that Hitler ordered all Panzer II production to be reserved for the Wespe alone, dropping other projects such as the Marder II. Rare, they were allocated to the armored artillery battalions (Panzerartillerie Abteilungen) of Panzer divisions along with heavier Hummel self-propelled guns.