#munition__fortification  defensive structure consisting of walls or mounds built around a stronghold to strengthen it
  supertype:  defensive_structure__defensivestructure__defense  a structure used for defense; "the artillery battered down the defenses"
  subtype:  bastion.munition  bunker  castle  defilade  entrenchment  escarp  fieldwork  lunette  Maginot_Line  palisade  parapet  Siegfried_line  stockade
  part:  rampart__bulwark__wall  an embankment built around a space for defensive purposes; "they stormed the ramparts of the city"; "they blew the trumpet and the walls came tumbling down"

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