ADP 3-90, page 95

Glossary 31 July 2019 ADP 3-90 Glossary-9 *platoon A subdivision of a company or troop consisting of two or more squads or sections. *point of departure The point where the unit crosses the line of departure and begins moving along a direction of attack. position of relative advantage A location or the establishment of a favorable condition within the area of operations that provides the commander with temporary freedom of action to enhance combat power over an enemy or influence the enemy to accept risk and move to a position of disadvantage. (ADP 3-0) *primary position The position that covers the enemy’s most likely avenue of approach into the area of operations. *probable line of deployment A phase line that designates the location where the commander intends to deploy the unit into assault formation before beginning the assault. protection warfighting function The related tasks and systems that preserve the force so the commander can apply maximum combat power to accomplish the mission. (ADP 3-0) *pursuit A type of offensive operation designed to catch or cut off a hostile force attempting to escape, with the aim of destroying it. rally point An easily identifiable point on the ground at which units can reassemble and reorganize if they become dispersed. (ATP 3-21.20) *rearward passage of lines Occurs when a unit passes through another unit’s positions while moving away from the enemy. reconnaissance 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 in force A type of reconnaissance operation designed to discover or test the enemy’s strength, dispositions, and reactions or to obtain other information. *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. reconstitution Those actions, including regeneration and reorganization, commanders plan and implement to restore units to a desired level of combat effectiveness commensurate with mission requirements and available resources. (JP 3-02) relief in place 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) *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.