What does DENIED AREA stand for? 

Denied area

The United States Department of Defense defines a denied area as "an area under enemy or unfriendly control in which friendly forces cannot expect to operate successfully within existing operational constraints and force capabilities." When a reference is made to a friendly force denying an area to the enemy, such as a reference to friendly forces employing area-denial weapons, the intent is to create an area in which the enemy cannot operate without extreme risk. Land mines can be used as area-denial weapons, and some modern semi-autonomous or remotely-controlled artillery units can serve this purpose as well. In theory, nuclear, biological, and chemical weapons can also serve this purpose, for varying lengths of times, though such weapons have not yet been used for this purpose in major wars, although such weapons have been used for other purposes. It's important to realize that some effective tactics for creating a denied area do not require a significant continuing commitment of personnel or additional material. For example, once a minefield is in place, no upkeep is required unless a significant percentage of the mines have been detonated or destroyed—no residual force commitment is required. This is why a denied area may well exist behind enemy lines when, if it were secured by friendly forces on the ground, it might be considered a forward position. However, it's equally important to realize that, when hostilities end, these areas can be very dangerous and expensive to clean up, assuming that one of the combatants is willing to..

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