When and why did the US military change from barbed wire to concertina razor wire? Was it an American invention? - Quora
![U.S. Army Reserve Soldiers with the 348th Engineer Company, lay concertina wire while emplacing a hasty frat fence during Sapper Stakes 2015 at Fort Chaffee, Ark., Sept. 1. (U.S. Army photo by U.S. Army Reserve Soldiers with the 348th Engineer Company, lay concertina wire while emplacing a hasty frat fence during Sapper Stakes 2015 at Fort Chaffee, Ark., Sept. 1. (U.S. Army photo by](https://c8.alamy.com/comp/PE3RGT/us-army-reserve-soldiers-with-the-348th-engineer-company-lay-concertina-wire-while-emplacing-a-hasty-frat-fence-during-sapper-stakes-2015-at-fort-chaffee-ark-sept-1-us-army-photo-by-staff-sgt-debralee-best-PE3RGT.jpg)
U.S. Army Reserve Soldiers with the 348th Engineer Company, lay concertina wire while emplacing a hasty frat fence during Sapper Stakes 2015 at Fort Chaffee, Ark., Sept. 1. (U.S. Army photo by
![U.S. Army Soldiers, with the 5th Battalion 7th Air Defense Artillery Regiment, lay down razor wire for creating an Entry Control Point (ECP) during a “Patriot Shock” exercise in Capu Midia, Romania U.S. Army Soldiers, with the 5th Battalion 7th Air Defense Artillery Regiment, lay down razor wire for creating an Entry Control Point (ECP) during a “Patriot Shock” exercise in Capu Midia, Romania](https://c8.alamy.com/comp/TYEFRK/us-army-soldiers-with-the-5th-battalion-7th-air-defense-artillery-regiment-lay-down-razor-wire-for-creating-an-entry-control-point-ecp-during-a-patriot-shock-exercise-in-capu-midia-romania-on-november-4-2016-the-weeklong-exercise-tests-the-units-quick-response-deployment-readiness-and-increases-joint-interoperability-with-patriot-missile-systems-and-their-romanian-partners-TYEFRK.jpg)