The design, construction and use of Hitler's retreat in the Bavarian Alps, Eagle's Nest.

In yet another example of Hilter's folly he orders impregnable fortresses built on the Channel Islands. Despite the incredible expense of construction the fortifications prove useless when the Allies go on the offensive on D-Day. But , it was a safe, if dull, place for a few German soldiers to wait out the war. Written by David Foss

Guderian's book Achtung Panzer introduces the concept of the combined arms offensive. Hitler seizes upon it as the way to use modern weapons technology in Germany's tradition of fighting fast, short wars to overcome the stalemate of trench warfare. Written by David Foss

U-boat innovations that were advanced well beyond any other submarine designs of WW2, including the Walter propulsion system, the Type XVII the Type XXI.

The design, construction and operational history of the two greatest battleships ever built - the Japanese super-battleships Yamato and Musashi.

Details the formidable Japanese defenses on the island of Okinawa during WW2, and the ultimate test of them.