text: Glossary
  reorganization
  All measures taken by the commander to maintain unit combat effectiveness or return it to a specified
  level of combat capability. (FM 3-90-1)
  reserve
  (Army) That portion of a body of troops that is withheld from action at the beginning of an
  engagement to be available for a decisive movement. (ADP 3-90)
  restrictive fire line
  (DOD) A specific boundary established between converging, friendly surgace forces that prohibits
  fires or their effects from crossing. (JP 3-09)
  retirement
  When a force out of contact moves away from the enemy. (ADP 3-90)
  retrograde
  (Army) A type of defensive operation that involves organized movement away from the enemy.
  (ADP3-90)
  risk management
  (DOD) The process to identify, assess, and control risks and make decisions that balance risk cost with
  mission benefits. (JP 3-0)
  route reconnaissance
  A type of reconnaissanceoperation to obtain detailed information of a specified route and all terrain
  from which the enemy could influence movement along that route. (ADP 3-90)
  rule of law
  A principle under which all persons, institutions, and entities, public and private, including the state
  itself, are accountable to laws that are publicly promulgated, equally enforced, and independently
  adjudicated, and that are consistent with international human rights principles. (ADP 3-07)
  running estimate
  The continuous assessment of thecurrent situation used to determine if the current operation is
  proceeding according to the commander’s intent and if planned future operations are supportable.
  (ADP 5-0)
  screen
  A type of security operation that primarily provides early warning to the protected force. (ADP 3-90)
  search and attack
  A technique for conducting a movement to contact that shares many of the characteristics of an area
  security mission. (FM 3-90-1)
  security area
  That area occupied by a unit’s security elements and includes the areas of influence of those security
  elements. (ADP 3-90)
  security cooperation
  (DOD) All Department of Defense interactions with foreign security establishments to build security
  relationships that promote specific United States security interests, develop allied and partner nation
  military and security capabilities for self-defense and multinational operations, and provide United
  States forces with peacetime and contingency access to allied and partner nations. (JP 3-20)
  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 3-20)