Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
Panzer III
Around the time of the beginning of Operation Barbarossa in the summer of 1941, the Panzer III was, numerically, the most important German tank on the frontline. At this time period, the majority of the available tanks (including re-armed Ausf. Es and Fs, plus new Ausf. G and H models) for the invading German military had the KwK 38 L/42 50mm cannon, which also equipped the majority of Panzer IIIs fighting in North Africa. Initially, the Panzer IIIs were significantly outclassed by the more-advanced Soviet T-34 medium and KV series of heavy tanks, the former of which was gradually encountered in greater numbers by the German forces as the invasion progressed. However, the most numerous Soviet tanks the Germans encountered at the start of the invasion were older T-26 infantry and BT class of cruiser tanks. This fact, together with superior German tactical and strategic skills in armoured clashes, sufficient quality crew training, and the generally-good ergonomics of the Panzer III, all contributed to a favourable kill-loss ratio of approximately 6 to 1 for German tanks of all types in 1941.