Gorge (fortification)
# 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.

