The Germans used tanks in World War II mainly for the Blitzkrieg War(Lightning War)The biggest and most powerful German tank in the beginning of W.W.II is 18 ft. long, weighs 19 tons and had 1 inch armor. Germany at the end of W.W.II was operating 68 tons, 24 ft. long and had 6 inch armored tanks. In the end of W.W.II the German Tanks failed the last German offensive attack against the American tanks.(The Battle Of The Bulge.)