Cavalier (fortification) explained

A cavalier is a fortification which is built within a larger fortification, and which is higher than the rest of the work. It usually consists of a raised platform within a fort or bastion, so as to be able to fire over the main parapet without interfering with the fire of the latter.^[1] Through the use of cavaliers, a greater volume of fire can be obtained, but its greater height also makes it an easier target for a besieger's guns.^[2]

There are two types of cavaliers:

• Common cavalier – a raised gun platform without any additional defensive features
• Defensible cavalier – a raised gun platform surrounded by a ditch. If the ditch cuts across the bastion's terreplein and is supported by cuts, the cavalier can also be considered as a retrenchment.^[3]

Notes and References

1. Spiteri. Stephen C.. Illustrated Glossary of Terms used in Military Architecture. ARX Supplement. 5. 2010. MilitaryArchitecture.com . https://web.archive.org/web/20101025044429/http://www.militaryarchitecture.com/index.php/Journals/illustrated-glossary-of-military-architecture-terms.html . 25 October 2010.
2. Cavalier. 5. 562–563.
3. Book: Pasley. Charles William. A Course of Elementary Fortification - Volume II. 1822. John Murray. London. 337–342. 2.