Concertina wire
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Concertina wire or Dannert wire is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire and steel pickets, i
Triple concertina wire fence
Baled concertina wire prior to deployment
Concertina wire can be a feature of prisons.
Wire obstacle
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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 a
Concertina wire
…like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape) and steel pickets, it is most often used to form military-style wire obstacles. It is also used in non-military settings, such as when used in prison barriers, detention camps, riot control, or at international borders. During…
A snow-covered obstacle with concertina wire
Juno Beach on D-Day, 1944. The barbed wire fence is crude and not very high. However, when combined with the steep, curving sea wall it slows down any attacker, giving time for a nearby machinegun bunker (visible on the far left) to sweep the area with enfilade fire. Note the soldier in the background, forced to use a ladder.
A complex obstacle belt of low wire entanglement backed by a double apron fence. Both obstacles have movable openings that can be blocked with knife rests.
The deadly result of enfilade fire during the Dieppe Raid of 1942: dead Canadian soldiers lie where they fell. Trapped between the beach and fortified sea wall (covered with barbed wire), they made easy targets for MG 34 machineguns in a German bunker. The bunker firing slit is visible in the distance, just above the German soldier's head.