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  2. Defensive wall - Wikipedia

    en.wikipedia.org/wiki/Defensive_wall

    A defensive wall is a fortification usually used to protect a city, town or other settlement from potential aggressors. The walls can range from simple palisades or earthworks to extensive military fortifications such as curtain walls with towers, bastions and gates for access to the city. [1]

  3. Retrenchment (military) - Wikipedia

    en.wikipedia.org/wiki/Retrenchment_(military)

    Map of St. Clement's Retrenchment between the Santa Margherita Lines and the Cottonera Lines in Cospicua, Malta. Retrenchment is a technical term in fortification, where it is applied to a secondary work or series of works constructed in rear of existing defences to bar the further progress of the enemy who succeeds in breaching or storming these.

  4. Swedish Fortifications Agency - Wikipedia

    en.wikipedia.org/wiki/Swedish_Fortifications_Agency

    The Swedish Fortifications Agency (Swedish: Fortifikationsverket, FortV) is a Swedish government agency under the Ministry of Finance, tasked with managing government-owned defence-related buildings and land.

  5. Casemate - Wikipedia

    en.wikipedia.org/wiki/Casemate

    A mid-19th century artillery casemate at Fort Knox, Maine.. A casemate is a fortified gun emplacement or armoured structure from which guns are fired, in a fortification, warship, or armoured fighting vehicle.

  6. List of fortifications - Wikipedia

    en.wikipedia.org/wiki/List_of_fortifications

    This is a list of fortifications past and present, a fortification being a major physical defensive structure often composed of a more or less wall-connected series of forts. Individual fortifications

  7. Category:Fortifications by type - Wikipedia

    en.wikipedia.org/wiki/Category:Fortifications_by...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  8. Compound (fortification) - Wikipedia

    en.wikipedia.org/wiki/Compound_(fortification)

    In military science, a compound is a type of fortification made up of walls or fences surrounding several buildings in the center of a large piece of land. The walls can either serve the purpose of being tall, thick, and impenetrable, in which case they would be made of wood, stone, or some other like substance; or dangerous to attempt to scale ...

  9. Fort Amsterdam, the quadrangular structure (left) in this 1660 image stood at the southern tip of Manhattan Island, defending New Amsterdam Fort Norfolk in 1861, a first system fort upgraded as part of the second system The Statue of Liberty is built on top of Fort Wood of the second system Fort Adams, one of the largest third system forts