A breastwork is a temporary

fortification A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Lati ...

, often an earthwork thrown up to breast or shoulder height to provide protection to defenders firing over it from a standing position. A more permanent structure, normally in stone, would be described as a

parapet A parapet is a barrier that is an upward extension of a wall at the edge of a roof, terrace, balcony, walkway or other structure. The word comes ultimately from the Italian ''parapetto'' (''parare'' 'to cover/defend' and ''petto'' 'chest/brea ...

or the

battlement A battlement, in defensive architecture, such as that of city walls or castles, comprises a parapet (a defensive low wall between chest-height and head-height), in which gaps or indentations, which are often rectangular, occur at intervals ...

of a castle wall. In warships, a breastwork is the armored superstructure in the ship that did not extend all the way out to the sides of the ship. It was generally only used in

ironclad An ironclad was a steam engine, steam-propelled warship protected by iron armour, steel or iron armor constructed from 1859 to the early 1890s. The ironclad was developed as a result of the vulnerability of wooden warships to explosive or ince ...

turret ships designed between 1865 and 1880.

References

See also