The Marder III is the name for a series of World War II German tank destroyers built on the chassis of the Panzer 38(t). The German word Marder means "marten" in English. They were in production from 1942 to 1944 and served on all fronts until the end of the war. The Marders were mechanically reliable, as with all vehicles based on the Czechoslovak 38t chassis. Their firepower was sufficient to destroy the majority of Soviet tanks on the battlefield at combat range.
Jagdtiger was the heaviest tank of WW2. It was also a piece of junk. Built by the Germans, only 88 were built. It weighed over 70 tons. It required meticulous care and training and most broke down before combat. When used properly, it was devastating. The 128mm round could destroy vehicles even after going through buildings. Its best success was in the last week of the war when a handful destroyed a battalion of American Shermans in a single day. The Germans still surrendered the next day.