Archaeologists have used the term defense-in-depth for decades to describe the obstacles erected to thwart attacks. At Dun Aengus, the most spectacular layer of defense was a band of chevaux-de-frise ...

Even more formidable were the Aca,!A"Marine Chevaux-de-Frise: ... March 30 was so windy that helmsmen of larger vessels had difficulty controlling their course in going through the frise.

None-too-subtle spikes at the 18 th-century Miles Brewton House in Charleston, South Carolina.. Spencer Means/Flickr/CC BY-SA 2.0 ...

Depuis le fort celtique de Dun Aengus, en Irlande, le principe des chevaux de frise n’a pas changé. C’est un obstacle, hérissé de piques, destiné à arrêter un adversaire (hier, un ...

Des chevaux de frises, défenses côtières, ici en fer, datant de la Seconde Guerre mondiale, sont réapparus, au beau milieu de la Lieue de Grève.

Elaborate earthworks, including chevaux de frise, and a water-filled moat bring the action of the assault to life, as the breach succeeds beyond Gordon’s “most sanguine expectations.” ...