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All-around defense or perimeter defense is a type of 
When a group of soldiers relocate as a part of a defensive operation, a perimeter defense can be temporarily maintained without cover.
defensive fighting position
A defensive fighting position is a type of Earthworks (engineering)#Military use, earthwork constructed in a military context, generally large enough to accommodate anything from one soldier to a fire team (or similar sized unit).
Terminology ...
intended to give military units the ability to repel attacks from any direction.
The positioning of the outer defensive fighting position
A defensive fighting position is a type of Earthworks (engineering)#Military use, earthwork constructed in a military context, generally large enough to accommodate anything from one soldier to a fire team (or similar sized unit).
Terminology ...
s of a unit, is circular or triangular,http://www.marines.mil/news/publications/Documents/FM%203-21.8%20%20The%20Infantry%20Rifle%20Platoon%20and%20Squad_5.pdf "The trace of the platoon is circular or triangular rather than linear" from a bird's-eye view
A bird's-eye view is an elevated view of an object or location from a very steep viewing angle, creating a perspective (graphical), perspective as if the observer were a bird in flight looking downward. Bird's-eye views can be an aerial photog ...
.
One version consists of soldiers forming a wide circle around the soldier in charge (and radioman
Radioman (RM) was a rating for United States Navy and United States Coast Guard enlisted personnel, specializing in communications technology.
History of the rating
The rating was created originally in 1921. In 1997, under the direction of Ch ...
etc.) with a spacing typically of 3–4 metres between each person (on the circle's circumference
In geometry, the circumference () is the perimeter of a circle or ellipse. The circumference is the arc length of the circle, as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length arou ...
).
When a group of soldiers relocate as a part of a defensive operation, a perimeter defense can be temporarily maintained without cover.
See also
*Defensive fighting position
A defensive fighting position is a type of Earthworks (engineering)#Military use, earthwork constructed in a military context, generally large enough to accommodate anything from one soldier to a fire team (or similar sized unit).
Terminology ...
*Infantry tactics
Infantry tactics are the combination of military concepts and methods used by infantry to achieve tactical objectives during combat. The role of the infantry on the battlefield is, typically, to close with and engage the enemy, and hold territo ...
*List of military tactics
This article contains a list of military tactics.
The meaning of the phrase is context sensitive, and has varied over time, like the difference between "strategy" and "tactics".
General
* Exploiting prevailing weather – the tactical use of w ...
*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 ...
References
{{DEFAULTSORT:All Round Defense All around