ADP 3-90, page 93

Glossary 31 July 2019 ADP 3-90 Glossary-7 forward line of own troops A line that indicates the most forward positions of friendly forces in any kind of military operation at a specific time. (JP 3-03) *forward passage of lines Occurs when a unit passes through another unit’s positions while moving toward the enemy. *guard A type of security operation done to protect the main body by fighting to gain time while preventing enemy ground observation of and direct fire against the main body. *hasty operation An operation in which a commander directs immediately available forces, using fragmentary orders, to perform tasks with minimal preparation, trading planning and preparation time for speed of execution. intelligence operations (Army) The tasks undertaken by military intelligence units through the intelligence disciplines to obtain information to satisfy validated requirements. (ADP 2-0) intelligence warfighting function The related tasks and systems that facilitate understanding the enemy, terrain, weather, civil considerations, and other significant aspects of the operational environment. (ADP 3-0) *key terrain (Army) An identifiable characteristic whose seizure or retention affords a marked advantage to either combatant. *limit of advance A phase line used to control forward progress of the attack. *line of contact A general trace delineating the location where friendly and enemy forces are engaged. line of departure In land warfare, a line designated to coordinate the departure of attack elements. (JP 3-31) *linkup A meeting of friendly ground forces, which occurs in a variety of circumstances. *local security The low-level security activities conducted near a unit to prevent surprise by the enemy. *main battle area The area where the commander intends to deploy the bulk of the unit’s combat power and conduct decisive operations to defeat an attacking enemy. *main body The principal part of a tactical command or formation. It does not include detached elements of the command, such as advance guards, flank guards, and covering forces. *maneuver (Army) Movement in conjunction with fires. (joint) Employment of forces in the operational area, through movement in combination with fires and information, to achieve a position of advantage in respect to the enemy. (JP 3-0) *meeting engagement A combat action that occurs when a moving force, incompletely deployed for battle, engages an enemy at an unexpected time and place. *mobile defense A type of defensive operation that concentrates on the destruction or defeat of the enemy through a decisive attack by a striking force.