The flèche is similar in plan to other defensive works like the ravelin and demi-lune, but smaller and built in front of the glacis. It was thus part of the outworks of a fortress. It was usually placed in front of the point of a bastion in order to create an additional level of fire.
- A Dictionary of Military Architecture Fortification and Fieldworks from the Iron Age to the Eighteenth Century by Stephen Francis Wyley. Retrieved 23 May 2015.