Any talk of a “Ring of Steel” within a country’s borders is already an admission that the walls have been breached and invaders are free to murder, rape, and pillage at will. Custer, too, hand a ring of steel at Little Big Horn.A European example: Hitler was always decreeing this or that place was now a "fortress" ringed by steel. Each one was breached or bypassed to let wither on the vine.
Mr. niteowl77