text: Chapter 1
  deep area — Where the commander sets conditions for future success in close combat. (ADP 3-0)
  deep operations — Tactical actions against enemy forces, typically out of direct contact with friendly forces,
  intended to shape future close operations and protect rear operations. (FM 3-0)
  deep sensing — The employment of capabilities beyond the division coordinated fire line to collect data and
  information that supports targeting, situational understanding, or decision making. (FM 2-0)
  defeat — To render a force incapable of achieving its objectives. (ADP 3-0)
  defeat in detail — Concentrating overwhelming combat power against separate parts of a force rather than
  defeating the entire force at once. (ADP 3-90)
  defeat mechanism — The method through which friendly forces accomplish their mission against enemy
  opposition. (ADP 3-0)
  defended asset list — (DOD) A listing of those assets from the critical asset list prioritized by the joint force
  commander to be defended with the resources available. (JP 3-01) Also called DAL.
  defense coordinating element — (DOD) A staff and military liaison officers who assist the defense coordinating
  officer in facilitating coordination and support to activated emergency support functions. (JP 3-28) Also called
  DCE.
  defense coordinating officer — (DOD) Department of Defense single point of contact for domestic
  emergencies who is assigned to a joint field office to process requirements for military support; forward
  mission assignments through proper channels to the appropriate military organizations; and assign military
  liaisons, as appropriate, to activated emergency support functions. (JP 3-28) Also called DCO.
  defense design — A strategy for defense based on a compiled list of defensive tasks required to defend against
  a specific threat or support specific mission operations. Each defensive task is built using intelligence, features
  such as friendly force lay down, adversary forces lay down, named area of interest or ballistic missile
  operations areas, and characteristics such as defended assets, terrain, system location or orientation, and
  limitations. (FM 3-27)
  defense industrial base — (DOD) The Department of Defense, government, and private sector worldwide
  industrial complex with capabilities to perform research and development and design, produce, and maintain
  military weapon systems, subsystems, components, or parts to meet military requirements. (JP 3-27) Also
  called DIB.
  defense plan — Multiple defense designs combined together to create a cohesive plan for defending a broad
  area. (FM 3-27)
  defense support of civil authorities — (DOD) Support provided by U.S. Federal military forces, Department of
  Defense civilians, Department of Defense contract personnel, Department of Defense component assets, and
  National Guard forces (when the Secretary of Defense, in coordination with the governors of the affected
  States, elects and requests to use those forces in Title 32, United States Code, status) in response to requests
  for assistance from civil authorities for domestic emergencies, law enforcement support, and other domestic
  activities, or from qualifying entities for special events (DODD 3025.18) Also called DSCA.
  Defense Transportation System — (DOD) That portion of the worldwide transportation infrastructure that
  supports Department of Defense transportation needs. (JP 4-01) Also called DTS. See also transportation
  system.
  defensive counterair — (DOD) All defensive measures designed to neutralize or destroy enemy forces
  attempting to penetrate or attack through friendly airspace. (JP 3-01) Also called DCA.
  defensive cyberspace operations — (DOD) Missions to preserve the ability to utilize blue cyberspace
  capabilities and protect data, networks, cyberspace-enabled devices, and other designated systems by
  defeating on-going or imminent malicious cyberspace activity. (JP 3-12) Also called DCO.
  defensive cyberspace operations-internal defensive measures — (DOD) Operations in which authorized
  defense actions occur within the defended portion of cyberspace. (JP 3-12) Also called DCO-IDM.
  defensive cyberspace operations-response actions — (DOD) Operations that are part of a defensive
  cyberspace operations mission that are taken external to the defended network or portion of cyberspace
  without the permission of the owner of the affected system. (JP 3-12) Also called DCO-RA.
  defensive fires — Surface to surface indirect fires intended to disrupt discovered enemy preparations for an
  attack. (FM 3-09)
  defensive operation — An operation to defeat an enemy attack, gain time, economize forces, and develop
  conditions favorable for offensive or stability operations. (ADP 3-0)
  defensive space control — (DOD) Active and passive measures taken to protect friendly space capabilities
  from attack, interference, or unintentional hazards. (JP 3-14) Also called DSC.