 Gorge (fortification)

A gorge in fortification construction is the rear part of an independent fieldwork or detached outwork in front of the main fortress or defensive position.Towards the end of the 18th century, when the Vauban style of fortification was no longer desirable or able to be used (the cost of this type of fortification could be exorbitant, because to reinforce it another ring of bastions had to be built around existing bastions), military construction engineers began instead to build self-contained outworks in front of fortresses (e.g.