A concise soldier’s manual offering practical instruction on constructing and using defensive trench systems, describing layout elements such as wire obstacles, listening posts, traversed and communication trenches, supporting points, and mortar and machine-gun positions. It details construction and maintenance techniques including drainage, revetments, dugouts, and use of natural cover, and explains organization of working parties. Separate sections cover grenade and gas methods, patrols, observation and sniping, routine service in the trenches, care of arms and men, and conduct during attacks. Plates and straightforward language are provided to make the guidance readily usable by troops preparing for front-line duty.