Army of Steel

''If the tanks succeed, then victory follows.''
General Heinz Guderian, 1937

When Germany attacked Poland on 1 September 1939, nothing like it had ever been seen before. Heralded by the insidious whine of Stuka divebombers, seven divisions of Panzers rolled across the border supported by motorized infantry.

While tanks were punching gaping holes through Polish lines and racing on at speed towards War...