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.
Sturmgeschütz IV The Sturmgeschütz IV (StuG IV) (Sd.Kfz. 167), was a German assault gun variant of the Panzer IV used in the latter part of the Second World War. Identical in role and concept to the highly successful StuG III assault gun variant of the Panzer III, both StuG models were given an exclusively tank destroyer role in German formations and tactical planning in the last two years of the war, greatly augmenting the capability of the dwindling tank force available to the German army on the Eastern and Western fronts.