Jagdpanther had a cannon that was previously used on the German heavy tank used during what event?
Jagdpanther The Jagdpanther (German: "hunting panther"), SdKfz 173, was a tank destroyer built by Nazi Germany during World War II based on the chassis of the Panther tank. It entered service in 1944 during the later stages of the war on the Eastern and Western Fronts. The "Jagdpanther" combined the 8.8 cm KwK 43 cannon of the Tiger II and the armor and suspension of the Panther chassis, although it suffered from the general poor state of German ordnance production, maintenance and training in the later part of the war, which resulted in small production numbers, shortage of spare parts and poor crew readiness.
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.