The author includes weapons and associated equipment designed to overcome the problems of trench warfare at trench level, and examines some of the unsuccessful ideas that never made it to the Front. Some of the weapons, like the Livens projector, have remained largely unknown. Anthony Saunders narrative describes each type of equipment, its development and effectiveness, and what the troops at the Front thought of it, as well as official reaction to the weapons. The source material has been drawn from files in the Public Record Office and from UK patents - a rich but little-used source of detailed information about World War I weapons inventions. The ranges of illustrations supporting the text include contemporary photos and detailed drawings.