Enfilade and defilade
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Enfilade and defilade are concepts in military tactics used to describe a military formation's exposure to enemy fire. A formation or position is "in enfilade" if weapon fire can be directed along its longest axis. A unit or position is "in defilade" if it uses natural or artificial obstacles to shield or conceal itself from enfilade and hostile fire.[1] The strategies, named by the English during the Hundred Years' War, use the French enfiler ("to put on a string or sling") and défiler ("to slip away or off") spoken by English nobility of the time.[2]
Enfilade fire—gunfire directed against an enfiladed formation or position—is also commonly known as "flanking fire".[1] Raking fire is the equivalent term in naval warfare. Strafing, firing on targets from a flying platform, is often done with enfilade fire. It is a very advantageous, and much sought for, position for the attacking force.
Enfilade
A formation or position is "in enfilade" if weapon fire can be directed along its longest axis.[3] For instance, a trench is enfiladed if the opponent can fire down the length of the trench. A column of marching troops is enfiladed if fired on from the front or rear such that the projectiles travel the length of the column. A rank or line of advancing troops is enfiladed if fired on from the side (from the flank).[1]
The advantages of enfilading missiles have been appreciated since
When planning field and other fortifications, it became common for mutually supporting positions to be arranged so that it became impossible to attack any one position without exposing oneself to enfilading fire from the others, this being found for example in the mutually supporting bastions of
Fire is delivered so that the long axis of the target coincides or nearly coincides with the long axis of the beaten zone.
Defilade
A unit or position is "in defilade" if it uses natural or artificial obstacles to shield or conceal. For an
Defilade is also used to refer to a position on the reverse slope of a hill or within a depression in level or rolling terrain. Defiladed positions on hilltops are advantageous because "dead space" – a space that cannot be engaged with direct fire – will be created in front of the position. Ideally, this dead space should be covered by the interlocking fields of fire of other nearby positions, and/or by pre-planned indirect fire such as mortars or other forms of artillery.
In the case of
In addition, if the tank fails to detect the defending antitank weapon while the tank is still defiladed, but advances beyond that position to the crest of the hill, it may expose the relatively thinner armor of its lower hull or belly to the defender. Early detection and elimination of antitank threats is an important reason that tanks attack with infantry support.
Artificial entrenchments can provide defilade by allowing troops to seek shelter behind a raised berm that increases the effective height of the ground, within an excavation that allows the troops to shelter below the surface of the ground or a combination of the two. The same principles apply to fighting positions for artillery and armored fighting vehicles.
Enfilade–defilade combination
A unit sited in defilade threatens an enemy that decides to pass it and move forward, because the enemy would be put in an enfiladed position when moving in a rank.[1] The friendly unit would be in a position that is shielded by terrain from direct enemy fire, while still being able to fire on the enemy in an effective manner.
See also
References
- ^ ISBN 0-415-02073-5.
- ^ a b "Chivalry and Betrayal: The Hundred Years War - Trouble in the Family: 1337–1360". 2013-02-11. Retrieved 2021-09-08.
- ISBN 978-1-60206-063-0.
- ^ "Military technology". Encyclopedia Britannica. Retrieved 11 February 2019.
Further reading
- Russian Fortresses, 1480–1682. ISBN 1-84176-916-9.
- Chartrand, René (March 20, 2005). French Fortresses in North America 1535–1763: Québec, Montréal, Louisbourg and New Orleans (Fortress 27). ISBN 978-1-84176-714-7.