Germany’s No. 6 tank E, usually referred to as the “Tiger” I tank. It was developed because the German armored forces unexpectedly encountered strong resistance from Soviet tanks in the months after the invasion of the Soviet Union, especially the T-34 and KV-1. The Tiger I was the first tank to be fitted with an 88mm gun, the anti-aircraft version of which had already demonstrated excellent anti-aircraft and anti-armor capabilities. During the war, the “Tiger” I appeared in almost all German front battles. It is usually deployed in independent heavy tank groups. “Tiger” I has produced a strong psychological deterrent to many opponents. Its design is very complicated, using a lot of expensive materials and production processes, and its production takes a lot of time. Thus between August 1942 and August 1944, only 1,347 were built.