ion (called Wespe) was produced in part of Poland occupied by Germany.
             The Panzer 3 was a medium size tank with a crew of five. It was the main German tank in 1940-1942. In the beginning it had a 37mm gun and two machine guns, but was planned for future use of bigger guns. It was used in a small number of invasions of Poland during the beginning of World War 2, with a 50mm gun. Since the new gun was so weak against Russian T-34 tanks, a more powerful 50mm gun was installed. Afterward models had an even bigger 75mm gun, same as the Panzer 4. The Panzer 3 production ended in mid 1943, but production of a self-propelled gun version continued until the end of the war. A total of 15,000 of these tanks were produced.
             The Panzer 4 was a medium tank that held 5 people. It was produced in 1936 and didn't stop till the end of the war. This tank was the main tank of the Germans. It carried a shirt-barreled 75mm gun, later replaced by a stronger long-barreled 75mm gun, and two machine guns. One of these machine guns was a coaxial gun, and the other one was a anti-aircraft machine gun on top of the tank. Its breathtaking framework remained unchanged despite many modifications and additions of extra armor. It was also the base for many variants, such as tank destroyers (Jagdpanzer 4), self-propelled guns and anti-aircraft guns, and others. 9,000 Panzer 4's were produced, and more would have been produced, if it wasn't for Hitler's obsession for complex and very expensive advanced weapons, which reduced the production of the Panzer 4 even before they were actually fully developed and tested.
             The Panther (or Panzer 5) was a heavy tank with a crew of four, which was designed to oppose the excellent Russian T-34 tank. It had sloped armor for better protection and carried a long barreled 75mm gun and two machine guns like the Panzer 4. Production of the Panther began later in 1942. The plan was to produce 600 pan...