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  2. Mexico–United States border wall - Wikipedia

    en.wikipedia.org/wiki/Mexico–United_States...

    The dark section at left is where the border crosses Mount Cristo Rey, an unfenced rugged area. The Secure Fence Act of 2006, signed into law on October 26, 2006, by President George W. Bush [36] authorized and partially funded the potential construction of 700 miles (1,100 km) of physical fence/barriers along the Mexican border. The bill ...

  3. Fortifications of the inner German border - Wikipedia

    en.wikipedia.org/wiki/Fortifications_of_the...

    Most common was a small concrete bunker known as an "earth bunker" (Erdbunker), usually recessed into a depression in the ground with a view along the guard road and border fence. It was constructed from two base sections, each 0.8 metres (2.6 ft) high with a cross-section of 1.8 by 1.8 metres (5.9 ft × 5.9 ft).

  4. Border barrier - Wikipedia

    en.wikipedia.org/wiki/Border_barrier

    A border barrier, border fence or border wall is a separation barrier that runs along or near an international border. Such barriers are typically constructed for border control purposes such as curbing illegal immigration, human trafficking, and smuggling. [1] [2] Some such barriers are

  5. Inner German border - Wikipedia

    en.wikipedia.org/wiki/Inner_German_border

    A "third-generation" fence, much more solidly constructed, was installed in an ongoing programme of improvements from the late 1960s to the 1980s. The fence line was moved back to create an outer strip between the fence and the actual border. The barbed-wire fences were replaced with a barrier that was usually 3.2–4.0 metres (10–13 ft) high.

  6. Melilla border fence - Wikipedia

    en.wikipedia.org/wiki/Melilla_border_fence

    Guard post and razor wire on the border fence in 2006 This third razor wire barrier cost Spain €33 million to construct. It consists of 11 km (6.8 mi) of parallel 3 m (9 ft 10 in) high fences topped with barbed wire, with regular watchposts and a road running between them to accommodate either police patrols or ambulance service in case of need.

  7. Protection of Czechoslovak borders during the Cold War

    en.wikipedia.org/wiki/Protection_of_Czechoslovak...

    A preserved fence with watchtower near Čížov (2009). The protection of borders between the Czechoslovak Socialist Republic (CSSR) and several of the capitalist countries of Western Europe, namely with Germany and Austria, in the Cold War era and especially after 1951, was provided by special troops of the Pohraniční Stráž (English: the Border Guard) and a system of engineer equipment ...

  8. Coastal defence and fortification - Wikipedia

    en.wikipedia.org/wiki/Coastal_defence_and...

    The first wave occurred around 1885 and was a response to fears of an attack by Russia. The second wave occurred during World War II and was due to fears of invasion by the Japanese. [15] The fortifications were built from British designs adapted to New Zealand conditions.

  9. Border Line (Switzerland) - Wikipedia

    en.wikipedia.org/wiki/Border_Line_(Switzerland)

    The Border Line bunkers were spaced between 500 metres (1,600 ft) and 750 metres (2,460 ft) along the northern border of Switzerland. [1] A number were integrated into bridge crossings of the Rhine and other rivers. [2] The large forts were armed with 75mm artillery and anti-tank weapons and were usually built into the forward slope of a hill.