Jagdpanther had a cannon that was previously used on the German heavy tank used during what event?
Tiger II Tiger II is the common name of a German heavy tank of the Second World War. The final official German designation was Panzerkampfwagen" Tiger "Ausf". B, often shortened to Tiger B. The ordnance inventory designation was "Sd.Kfz." 182. It is also known under the informal name Königstiger" (the German name for the Bengal tiger), often translated literally as Royal Tiger, or somewhat incorrectly as King Tiger by Allied soldiers, especially by American forces.
Panzer IV The "Panzerkampfwagen" IV (PzKpfw IV), commonly known as the Panzer IV, was a German medium tank developed in the late 1930s and used extensively during the Second World War. Its ordnance inventory designation was Sd.Kfz. 161.