J'ai lu dans
The Bear Went over the mountain (retex soviétique que je vous conseille de lire, en passant) une allusion à un obstacle, apparemment une espèce de barbelé, mais j'ai du mal à comprendre comment ca "marche" :
This Soviet tanglefoot obstacle is different than that used in western
armies. It is a large, compressed, banded spring made of high-quality wire.
It is similar to an uncontrolled "Slinky" toy. When unbanded during set up,
it uncoils wildly in every direction. It will stop dismounted soldiers, animals,
vehicles and even tanks. It is almost impossible to extricate anything
from this without heavy-duty wire cutters, pliers and lots of time. These
obstacles are called MZP (malozametnye prepyatstviya) or concealed obstacles
(ed.).
Si quelqu'un sait à quoi ca ressemble, ou mieux, a un schéma ou une photo, je suis preneur.