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Barbed wire - Wikipedia ... Barbed wire
Concertina wire - Wikipedia ... Concertina wire
Wire obstacle. In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt, delay and generally slow down an attacking enemy. During the time that the attackers are slowed by the wire obstacle (or possibly deliberately channelled into ...
The barbed wire strands on the top of the signal fence activated an alarm when pulled or cut, alerting the border guards. The signal or "hinterland" fence (Signalzaun) was the first of the border fences, dividing the Sperrzone from the more heavily guarded protective strip (Schutzstreifen) adjoining the actual border.
It is a natural building technique developed from historic military bunker construction techniques and temporary flood-control dike building methods. The technique requires very basic construction materials: sturdy sacks filled with organic material usually available on site. Standard earthbag fill material has internal stability.
Dragon's teeth (fortification)
Abatis - Wikipedia ... Abatis
Wiring party. Wiring parties, (or wiring sappers, cutters), were used during World War I on the Western Front as an offensive countermeasure against the enemy’s barbed wire obstacles. Though hazardous and stressful duty, work was done at night to repair, improve, and rebuild their own wire defences, while also sabotaging and cutting the enemy's.