Beneath the tranquil fields of France and Flanders lies a complex maze of tunnels dug during the First World War. These remains are part of a 'war beneath a war' which was waged every bit as ferociously as the war raging on the surface. Underground Battlefields is the result of years of hazardous exploration of these tunnel networks by the Durand Group beneath Vimy Ridge near Arras and Beaumont Hamel on the Somme.

The book shows how the latest technology can be applied to subterranean archaeology and reveals the significant impact of military tunneling on the war and describes the efforts of the men who lived, fought and died in this dark and claustrophobic subterranean world.