text: Chapter 1
  secure — A tactical mission task in which a unit prevents the enemy from damaging or destroying a force,
  facility, or geographical location. (FM 3-90)
  security — (DOD) Measures taken by a military unit, activity, or installation to protect itself against all acts
  designed to, or which may, impair its effectiveness. (JP 3-10)
  security area — That area that occupied by a unit’s security elements and includes the areas of influence of
  those security elements. (ADP 3-90)
  security assistance — (DOD) A group of programs authorized by federal statutes by which the United States
  provides defense articles, military training, and other defense-related services by grant, lease, loan, credit, or
  cash sales in furtherance of national policies and objectives, and those that are funded and authorized through
  the Department of State to be administered by Department of Defense/Defense Security Cooperation Agency,
  which are considered part of Security cooperation. (JP 3-20) Also called SA.
  security cooperation — (DOD) Department of Defense interactions with foreign security establishments to build
  relationships that promote specific United States security interests, develop allied and partner military and
  security capabilities for self-defense and multinational operations, and provide United States forces with
  peacetime and contingency access to allies and partners. (JP 3-20) Also called SC.
  security cooperation organization — (DOD) A Department of Defense element that is part of the United States
  diplomatic mission located in a foreign country to carry out security assistance and cooperation management
  functions under the supervision and coordination authority of the senior defense official/defense attach. (JP 3-
  22)Also called SCO.
  security force assistance — (DOD) The Department of Defense activities that support the development of the
  capacity and capability of foreign security forces and their supporting institutions. (JP 3-22) Also called SFA.
  (Army) The unified action to generate, employ, and sustain local, host nation, or regional security forces in
  support of legitimate authority. (FM 3-07)
  security forces — (DOD) Duly constituted military, paramilitary, police, and constabulary forces of a state. (JP
  3-22)
  security objective — The most important entity to protect during that specific security effort. (FM 3-90)
  security operations — Those operations performed by commanders to provide early and accurate warning of
  enemy operations, to provide the forces being protected with time and maneuver space within which to react
  to the enemy, and to develop the situation to allow commanders to effectively use their protected forces. (ADP
  3-90)
  security review — (DOD) The process of reviewing information and products prior to public release to ensure
  the material will not jeopardize ongoing or future operations. (JP 3-61)
  security sector reform — (DOD) A comprehensive set of programs and activities undertaken by a host nation
  to improve the way it provides safety, security, and justice. (JP 3-07) Also called SSR.
  seize — (DOD) To employ combat forces to occupy physically and to control a designated area. (JP 3-18)
  (Army) A tactical mission task in which a unit takes possession of a designated area using overwhelming
  force. (FM 3-90)
  self-defense obscuration — Obscuration employed to protect United States forces at the vehicle level. Self-
  defense obscuration is used to defeat or degrade adversary area of operations weapon system guidance links.
  (ATP 3-11.50)
  self-development training domain — Planned, goal-oriented learning that reinforces and expands the depth
  and breadth of an individual’s knowledge base, self-awareness, and situational awareness; complements
  institutional and operational learning; enhances professional competence; and meets personal objectives.
  (ADP 7-0)
  senior airfield authority — (DOD) An individual designated by the joint force commander to be responsible for
  the control, operation, and maintenance of an airfield, to include the runways, associated taxiways, parking
  ramps, land, and facilities whose proximity directly affects airfield operations. (JP 3-36) Also called SAA.
  sensitive site — (DOD) A geographically limited area that contains, but is not limited to, adversary information
  systems, war crimes sites, critical government facilities, and areas suspected of containing high-value targets.
  (JP 3-31)
  sequel — (DOD) The subsequent operation or phase based on the possible outcomes of the current operation
  or phase. (JP 5-0)
  sequential relief in place — Occurs when each element within the relieved unit is relieved in succession, from
  right to left or left to right, depending on how it is deployed. (ADP 3-90)
  Service doctrine — Those publications approved by a single Service for use within that Service. (ADP 1-01)