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.
Marder III "Marder" III was the name for a series of World War II German tank destroyers. They mounted either Soviet 76.2 mm F-22 Model 1936 divisional field guns, or German 7.5 cm PaK 40, in an open-topped fighting compartment on top of the chassis of the Panzer 38(t). They offered little protection to the crew, but added significant firepower compared to contemporary German tanks. They were in production from 1942 to 1944 and served on all fronts until the end of the war, along with the similar Marder II. The German word "Marder" means "marten" in English.