The Panzers were actually outclassed by the USSR's T-34s and the USA/UK's Shermans, the two main tanks used by the allies during WWII. The Germans eventually switched production to the much larger & more powerful Panthers and Konigstigers, however the USSR and USA could produce the T-34s (over 84,000 built) and Shermans (over 50,000) at a much faster rate than the Germans could Panthers (6000) and Konigstigers (under 2000). Even with their 16000+ Panzer II, III & IV's, the Germans were hopelessly outnumbered. Also, the larger German tanks were much better at long-distance fighting. Panthers had weak side-armour, while the Konigstiger was slow and had poor maneuverability. Both were designed to destroy the enemy before it came in close, so on a level battlefield (both literally and figuratively) a Konigstiger or Panther unit would always defeat a T-34 or Sherman unit. However the battlefields were rarely level: the Allies' tanks were cheaper to build & operate, so the Germans were almost always vastly outnumbered, while the Germans' much bigger firing range was only an advantage on flat terrain - hills, trees & buildings made it irrelevant.