Synopsis: This volume of "The War File" series covers Operation Barbarossa, the Nazis' June 1941 raid on the Soviet Union. At the heart of the invasion were the Panzers, tanks so effective they made the name synonymous with relentless armored battle. Footage of the monstrous machines in battle accompanies schematic 3-D computer models, a look at surviving specimens, and commentary on armored battle by historians and authorities.