Through the early war period (1939-1942) German forces enjoyed great success - speeding their way across huge swathes of Europe with their revolutionary Blitzkrieg tactics. As the war progressed, they fought on every front - from the icy steppes of the Soviet Union, the dust-choked sands of El Alamein, the beaches of Normandy, to the rubble-strewn streets of Berlin. German industrial infrastructure ultimately struggled to keep up with demand from the front line. However, thanks to a seemingly unquenchable thirst for advancement, German equipment of the era is widely regarded to be technologically superior to that of the Allies - the prime example being the German 'Big Cats' - the Panther and Tiger tanks, which have become quintessential icons of the conflict.