The story of how a unique British tunneling technique developed for the mud of Flanders was employed to win the strategic ground during the gruesome trench warfare of the Ypres Salient.

An exploration of newly discovered fortresses, dugouts, and bunkers tells the story of the innovative German engineering that made defenses resistant to massive bombardments.

For three years the Germans and French blew each other up with massive explosions, using a maze of underground galleries and tunnels. The whole story is told through the preserved diaries of Herman Hoppe, a German engineer who built many of the tunnels.

A personal account of the tragic battles that unfolded amid the sharp gullies and ravines of the Dolomites, requiring men to perform the nearly impossible: excavate and tunnel through solid granite in freezing weather.