text: Glossary
  Department of Defense information network-Army
  An Army-operated enclave of the Department of Defense information network that encompasses all
  Army information capabilities that collect, process, store, display, disseminate, and protect information
  worldwide. (ATP 6-02.71)
  deployment
  (DOD) The movement of forces into and out of an operational area. (JP 3-35)
  depth
  The extension of operations in time, space, or purpose to achieve definitive results. (ADP 3-0)
  destroy
  A tactical mission task that physically renders an enemy force combat-ineffective until it is
  reconstituted. Alternatively, to destroy a combat system is to damage it so badly that it cannot perform
  any function or be restored to a usable condition without being entirely rebuilt. (FM 3-90-1)
  detachment left in contact
  An element left in contact as part of the previously designated (usually rear) security force while the
  main body conducts its withdrawal. (FM 3-90-1)
  direct fire
  (DOD) Fire delivered on a target using the target itself as a point of aim for either the weapon or the
  director. (JP 3-09.3)
  disengage
  A tactical mission task where a commander has the unit break contact with the enemy to allow the
  conduct of another mission or to avoid decisive engagement. (FM 3-90-1)
  disengagement line
  A phase line located on identifiable terrain that, when crossed by the enemy, signals to defending
  elements that it is time to displace to their next position. (ADP 3-90)
  disintegrate
  To disrupt the enemy’s command and control system, degrading its ability to conduct operations while
  leading to a rapid collapse of the enemy’s capabilities or will to fight. (ADP 3-0)
  dislocate
  To employ forces to obtain significant positional advantage, rendering the enemy’s dispositions less
  valuable, perhaps even irrelevant. (ADP 3-0)
  double envelopment
  This results from simultaneous maneuvering around both flanks of a designated enemy force.
  (FM3-90-1)
  early-entry command post
  A lead element of a headquarters designed to control operations until the remaining portions of the
  headquarters are deployed and operational. (FM 6-0)
  echelon support
  The method of supporting an organization arrayed within an area of operations. (ATP 4-90)
  electromagnetic spectrum
  (DOD) The range of frequencies of electromagnetic radiation from zero to infinity. It is divided into 26
  alphabetically designated bands. (JP 3-85)
  electromagneticwarfare
  (DOD) Military action involving the use of electromagnetic and directed energy to control the
  electromagnetic spectrum or to attack the enemy. (JP 3-85)