The Wehrmacht saw several examples during their advance 39-42 of the uselessness of a few heavy tanks against a balanced and adequate tank force and of course of an effective airforce. For example at the early stages of war the wehrmacht faced the Char 2C, Char B1, KW 1-2, T-28, T-35 etc with their inferior medium/light tanks, but with an highly effective airforce and air superiority. During Operation Barbarossa, ninety percent of the T-35s lost by the 67th and 68th Tank Regiments were lost not to enemy action but through either mechanical failure or because they were abandoned and destroyed by their crews. That sounds like the story of the Kingtiger In 1940 the vast majority of Char B1 combat losses was inflicted by German artillery and anti-tank guns. Like german losses in normandy. In direct meetings with German tanks the Char B1 usually had the better of it, sometimes spectacularly so as when the Eure on 16 May frontally attacked and destroyed thirteen German tanks lying in ambush in Stonne, all of them Panzerkampfwagen III and Panzerkampfwagen IV's, in the course of a few minutes. The tank safely returned despite being hit 140 times. Like Wittmann, Barkmann and co. So the heavy tank was able to perform quite well and to win spectacular battles, but was doomed by air superiority, logistic means (if you´re on retreat) and even by inferior enemy tank forces. So why did the Wehrmacht develop the Tiger I., Panther and even planned the Maus or an 1500 ton tank with an 80 cm gun. Why didn´t the Tiger I get the Kwk 40 instead of the Kwk 36, wouldn´t this mean an important saving of its weight. Hate so many whys, but why didn´t they copy the T-34 with all its ingeniously characteristics and/or modify them ? Regards, Che.