During a war, field work is at least as important as the work of the fighting troops. The main tasks behind and on the front are the construction of shelters, transport of materials and men, and building roads and bunkers. An often-used obstacle is barbed wire fencing. At the start of the war, troops hammer poles into the ground to attach the wires. This is a loud and dangerous job. These ‘pigs' tails’ offer a solution: the metal pickets silently drill through the ground like a cork screw. They are so efficient that farmers even today use them to fence their land with barbed wire. But the most ingenious structures of the First World War are the trenches. They are thé symbol of the Great War. Via the stairs, you will get to a complex system of different trenches in open air.