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  2. Wire obstacle - Wikipedia

    en.wikipedia.org/wiki/Wire_obstacle

    The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.

  3. Cheval de frise - Wikipedia

    en.wikipedia.org/wiki/Cheval_de_frise

    The cheval de frise (plural: chevaux de frise [ʃə.vo də fʁiz], "Frisian horses") was a defensive obstacle, existing in a number of forms, principally as a static anti-cavalry obstacle but also quickly movable to close breaches. The term was also applied to underwater constructions used to prevent the passage of ships or other vessels on rivers.

  4. Abatis - Wikipedia

    en.wikipedia.org/wiki/Abatis

    An abatis, abattis, or abbattis is a field fortification consisting of an obstacle formed (in the modern era) of the branches of trees laid in a row, with the sharpened tops directed outwards, towards the enemy. The trees are usually interlaced or tied with wire. Abatis are used alone or in combination with wire entanglements and other ...

  5. Wiring party - Wikipedia

    en.wikipedia.org/wiki/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.

  6. Concertina wire - Wikipedia

    en.wikipedia.org/wiki/Concertina_wire

    Concertina wire or Dannert wire [1] 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/or razor wire/tape ) and steel pickets , it is most often used to form military-style wire obstacles .

  7. Czech hedgehog - Wikipedia

    en.wikipedia.org/wiki/Czech_hedgehog

    Examples of Czech hedgehogs deployed on the Atlantic Wall in the vicinity of Calais. The Czech hedgehog's name refers to its origin in Czechoslovakia.The hedgehogs were originally used on the Czech–German border by the Czechoslovak border fortifications – a massive but never-completed fortification system that was turned over to Germany in 1938 after the occupation of the Sudetenland as a ...

  8. Hesco bastion - Wikipedia

    en.wikipedia.org/wiki/Hesco_bastion

    Assembling the HESCO unit entails unfolding it and filling it with sand, soil or gravel, usually using a front end loader.The placement of the barrier is generally very similar to the placement of a sandbag barrier or earth berm except that room must generally be allowed for the equipment used to fill the barrier.

  9. Screw picket - Wikipedia

    en.wikipedia.org/wiki/Screw_picket

    They later strung the barbed wire through the loops to form a defensive wire obstacle as a protection for their trench line. The British called this type of stake a 'corkscrew' picket because it was screwed into the ground rather than hammered in as the timber posts had been (the hammering made loud noise, usually attracting enemy fire).