title: Gorge (fortification)
text: # Gorge (fortification)
  
  A gorge in field fortification is the "unexposed side of a fieldwork", typically the rear of an independent fieldwork or detached outwork in front of the main fortress or defensive position.
  
  ## Outworks with open gorges
  
  Straith describes three commonly used classes of field work: "works open at the gorge, works enclosed all round and lines." He lists the following as works open at the gorge:
  
  * Redan
  * Lunette
  * Redan with flanks
  * Double Redan
  * Tenaille-head
  * Bastion-head
  
  Closed works are the redoubt, star fort and bastioned fort.
  
  Gorges of 'half-closed works' were usually closed either by a parapet or stockade.
  
  