text: Not only were soldiers forced to cross no man's land when advancing, and as the case might be when retreating, but after an attack the stretcher-bearers had to enter it to bring in the wounded.  No man's land remained a regular feature of the battlefield until near the end of World War I when mechanised weapons (i.e., tanks and airplanes) made entrenched lines less of an obstacle.
  Effects from World War I no man's lands persist today, for example at Verdun in France, where the Zone Rouge (Red Zone) contains unexploded ordnance, and is poisoned beyond habitation by arsenic, chlorine, and phosgene gas. The zone is sealed off completely and still deemed too dangerous for civilians to return: "The area is still considered to be very poisoned, so the French government planted an enormous forest of black pines, like a living sarcophagus", comments Alasdair Pinkerton, a researcher at Royal Holloway University of London, who compared the zone to the nuclear disaster site at Chernobyl, similarly encased in a "concrete sarcophagus".
  Cold War
  During the Cold War, one example of "no man's land" was the territory close to the Iron Curtain. Officially the territory belonged to the Eastern Bloc countries, but over the entire Iron Curtain, there were several wide tracts of uninhabited land, several hundred meters (yards) in width, containing watch towers, minefields, unexploded bombs, and other such debris. Would-be escapees from Eastern Bloc countries who successfully scaled the border fortifications could still be apprehended or shot by border guards in the zone.