Editing Concertina wire (section)

{{Short description|Type of barbed wire}}
{{Use British English|date=October 2010}}
{{Use dmy dates|date=October 2020}}

[[File:Razor Wire.jpg|right|250px|thumb|Triple concertina wire fence]]
[[File:US Army concertina wire.jpg|thumb|250x250px|Baled concertina wire prior to deployment]]

'''Concertina wire''' or '''Dannert wire'''<ref>{{cite web
 |url          = http://thesaurus.english-heritage.org.uk/thesaurus_term.asp?thes_no=365&term_no=123440
 |title        = Dannert Wire
 |work         = Online Thesaurus
 |publisher    = English Heritage
 |access-date  = 18 September 2010
 |archive-url  = https://web.archive.org/web/20110718172322/http://thesaurus.english-heritage.org.uk/thesaurus_term.asp?thes_no=365&term_no=123440
 |archive-date = 18 July 2011
 |url-status   = dead
}}</ref> is a type of [[barbed wire]] or [[razor wire]] that is formed in large [[Helix|coils]] which can be expanded like a [[concertina]]. In conjunction with plain barbed wire (and/or [[Barbed tape|razor wire/tape]]) and steel [[Screw picket|pickets]], it is most often used to form military-style [[wire obstacle]]s. It is also used in non-military settings, such as when used in [[Prison|prison barriers]], [[Internment|detention camps]], [[riot control]], or at international borders.
During [[World War I]], soldiers manufactured concertina wire themselves, using ordinary barbed wire. Today, it is factory made.