text: Chapter 1
  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)
  deputy fire support coordinator — The senior field artillery staff officer at corps and division headquarters who
  is responsible for advising the commander on the best use of available fires resources, providing input to
  necessary orders, and developing and implementing the fire support plan. (FM 3-09)
  derailer — Safety devices designed to limit unauthorized movement of a car or locomotive beyond a specific
  point. (ATP 4-14)
  desired perception — (DOD) In military deception, what the deception target must believe for it to make the
  decision that will achieve the deception objective. (JP 3-13.4)
  destroy — A tactical mission task that physically renders an enemy force combat-ineffective until it is
  reconstituted. (FM 3-90)
  destruction — In the context of the computed effects of field artillery fires, destruction renders a target out of
  action permanently or ineffective for a long period of time, producing 30-percent casualties or materiel
  damage. (FM 3-09)
  detachment — A tactical element organized on either a temporary or permanent basis for special duties. (ADP
  3-90)
  detachment left in contact — An element left in contact as part of the previously designated security force
  while the main body conducts its withdrawal. (FM 3-90) Also called DLIC.
  detainee — (DOD) Any person captured, detained, or otherwise under the control of Department of Defense
  personnel. (JP 3-31)
  detection — (DOD) 1. In tactical operations, the perception of an object of possible military interest but
  unconfirmed by recognition. 2. In surveillance, the determination and transmission by a surveillance system
  that an event has occurred. 4. In chemical, biological, radiological, and nuclear environments, the act of
  locating chemical, biological, radiological, and nuclear hazards by use of chemical, biological, radiological, and
  nuclear detectors or monitoring and/or survey teams. (JP 3-11)
  detention — A charge made on a carrier conveyance held by or otherwise delayed through the cause of the
  United States Government. (ATP 4-12)
  deterrence — (DOD) The prevention of action by the existence of a credible threat of unacceptable
  counteraction and/or belief that the cost of action outweighs the perceived benefits. (JP 3-0)
  diamond formation — A movement formation with one element leading, one element positioned on each flank,
  and the remaining elements to the rear. (FM 3-90)
  direct action — (DOD) Short-duration strikes and other small-scale offensive actions conducted as a special
  operation in hostile, denied, or diplomatically sensitive environments and which employ specialized military
  capabilities to seize, destroy, capture, exploit, recover, or damage designated targets. (JP 3-05)
  direct air support center — (DOD) The principal air control agency of the United States Marine Corps air
  command and control system responsible for the direction and control of air operations directly supporting the
  ground combat element. (JP 3-09.3) Also called DASC.
  direct exchange — A supply method of issuing serviceable materiel in exchange for unserviceable materiel on
  an item-for-item basis. (FM 4-40)
  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)
  direct haul — Single transport mission completed by the same vehicle(s). (ATP 4-11)
  direct liaison authorized — (DOD) That authority granted by a commander (any level) to a subordinate to
  directly consult or coordinate an action with a command or agency within or outside of the granting command.
  (JP 1 Volume 2) Also called DIRLAUTH.
  direct pressure force — A force employed in a pursuit that orients on the enemy main body to prevent enemy
  disengagement or defensive reconstitution. (FM 3-90)
  direct support — (DOD) A mission requiring a force to support another specific force and authorizing it to
  answer directly to the supported force’s request for assistance. (JP 3-09.3) Also called DS. (Army) A support
  relationship requiring a force to support another specific force and authorizing it to answer directly to the
  supported force’s request for assistance. (FM 3-0)
  directed energy — (DOD) An umbrella term covering technologies that relate to the production of a beam of
  concentrated electromagnetic energy or atomic or subatomic particles. (JP 3-85) Also called DE.
  directed obstacle — An obstacle directed by a higher commander as a specified task to a subordinate unit.
  (ATP 3-90.8)