The author of Case White: The Invasion of Poland delves into the strategy and weaponry of armored warfare during the early years of the Russo-German War.

The German panzer armies that swept into the Soviet Union in 1941 were an undefeated force that had honed their skill in combined arms warfare to a fine edge. The Germans focused their panzers and tactical air support at points on the battlefield defined as Schwerpunkt-main effort-to smash through any defensive line and then advance to envelope their adversaries.

Initially, these methods worked well in the early days of Operation Barbarossa and the tank forces of the Red Army suffered defeat after defeat. Although badly mauled in the opening battles, the Red Army's tank forces did not succumb to the German armored onslaught and German planning and logistical deficiencies led to over-extension and failure in 1941. In the second year of the invasion, the Germans directed their...