text: Glossary
  rearward passage of lines
  Occurs when a unit passes through another unit’s positions while moving away from theenemy.
  (ADP3-90)
  reconnaissance
  (DOD) A mission undertaken to obtain, by visual observation or other detection methods, information
  about the activities and resources of an enemy or adversary, or to secure data concerning the
  meteorological, hydrographic, or geographic characteristics of a particular area. (JP 2-0)
  reconnaissance handover
  The action that occurs between two elements in order to coordinate the transfer of information and/or
  responsibility for observation of potential threat contact, or the transfer of an assigned area from one
  element to another. (FM 3-98)
  reconnaissance handover line
  A designated phase line on the ground where reconnaissance responsibility transitions from one
  element to another. (FM 3-98)
  reconnaissance in force
  A type of reconnaissance operation designed to discover or test the enemy’s strength, dispositions, and
  reactions or to obtain other information. (ADP 3-90)
  reconnaissance objective
  A terrain feature, geographic area, enemy force, adversary, or other mission or operational variable
  about which the commander wants to obtain additional information. (ADP 3-90)
  reconnaissance-pull
  Reconnaissance that determines which routes are suitable for maneuver, where the enemy is strong and
  weak, and where gaps exist, thus pulling the main body toward and along the path of least resistance.
  This facilitates the commander’s initiative and agility. (FM 3-90-2)
  reconnaissance-push
  Reconnaissance that refines the common operational picture, enabling the commander to finalize the
  plan and support shaping and decisive operations. It is normally used once the commander commits to
  a scheme of maneuver or course of action. (FM 3-90-2)
  reconstitution
  (Army) Actions that commanders plan and implement to restore units to a desired level of combat
  effectiveness commensurate with mission requirements and available resources. (ATP 3-21.20)
  redeployment
  (Army) The transfer of forces and materiel to home and/or demobilization stations for reintegration
  and/or out-processing. (ATP 3-35)
  redundancy
  Using two or more like assets to collect against the same intelligence requirement. (FM 3-90-2)
  rehearsal
  A session in which the commander andstaff or unit practices expected actions to improve performance
  during execution. (ADP 5-0)
  relevant information
  All information of importance to the commander and staff in the exercise of command and control.
  (ADP 6-0)
  relief in place
  (DOD) An operation in which, by direction of higher authority, all or part of a unit is replaced in an
  area by the incoming unit and the responsibilities of the replaced elements for the mission and the
  assigned zone of operations are transferred to the incoming unit. (JP 3-07.3)