This book complements the Geological Society’s Special Publication 362: Military Aspects of Hydrogeology. Generated under the auspices of the Society’s History of Geology and Engineering Groups, it contains papers from authors in the UK, USA, Germany and Austria. Substantial papers describe some innovative engineering activities, influenced by geology, undertaken by the armed forces of the opposing nations in World War I. These activities were reactivated and developed in World War II. Examples include trenching from World War I, tunnelling and quarrying from both wars, and the use of geologists to aid German coastal fortification and Allied aerial photographic interpretation in World War II. The extensive introduction and other chapters reveal that ‘military geology’ has a longer history. These chapters relate to pre-twentieth century coastal fortification in the UK and the USA; conflict in the American Civil War; long-term ‘going’ assessments for German forces; tunnel repair after wartime route denial in Hong Kong; and tunnel detection after recent insurgent improvisation in Iraq.

This is the story of the British Army's endeavours during the Great War to deceive the enemy and trick him into weakening his defences and redeploying his reserves. In this year-by-year account, Martin Davies shows how Sir John French and Sir Douglas Haig actively encouraged their Army commanders to employ trickery so that all attacks should come as a 'complete surprise' to the enemy. The methods of concealment of real military artefacts and the creation of dummy ones were ingenious enough but the real art lay in the development of geographically dispersed deception plans which disguised the real time and place of attack and forced the enemy to defend areas threatened by fake operations. Some of these plans, such as disguising mules as tanks and creating dummy airfields bordered on the farcical but were often amazingly effective. The driving force behind the deception plans was GHQ and the Army commanders, further dispelling the myth of 'Lions led by Donkeys'. Evidence shows that the British Army employed deception to advantage in all their theatres of operation.

Following the early battles of 1914 along the Marne and in the Ypres salient, World War I rapidly changed from a war of movement into one of attrition, with the opposing sides entrenching themselves in a line of fortified positions from the Flanders coastline to the Swiss border. This volume details the different styles of fortification used on the Western Front throughout the course of the war, from the early ditches of 1914 to the complicated systems of 1918. It explains the development of the 'defence in depth' German system and the British reaction to it, as well as illustrating the importance of the pre-war forts, particularly around Verdun.