text: Tactical Mission Tasks
  CONTAIN
  B-19. Contain is a tactical mission task in which a unit stops, holds,
  or surrounds an enemy force. This causes the enemy to center their
  activity on a given front and prevent them from withdrawing any part of
  their forces for use elsewhere. Contain may identify a specific enemy
  unit, or geographic terms or time may express the limits of the
  containment. Containment allows an enemy force to reposition itself
  within the designated geographic area, while fixing an enemy does not.
  The contain graphic encompasses the entire area desired to contain
  enemy forces during the development of alternative courses of action.
  Figure B-9 depicts the contain tactical mission task.
  Figure B-9. Contain task
  CONTROL
  B-20. Control is a tactical mission task in which a unit maintains
  physical influence over an assigned area. By controlling an area, units
  prevent its use by an enemy force or create conditions necessary for
  friendly operations. That influence can result from friendly forces
  occupying the specified area or dominating that area by their weapon
  systems. Control of an area does not require the complete clearance of all
  enemy soldiers from that area. The tactical mission task of control differs
  from that of secure because secure does not allow enemy fires to impact
  on the secured area. Enemy forces can engage targets within the
  controlled area, but they cannot move ground forces through that area. A Figure B-10. Control task
  unit designated to control a route or area directs and regulates the use of
  the area, to include movement of friendly traffic through the designated area or route. Control may also mean
  a command relationship or a function commanders exercise through their command and control systems.
  Figure B-10 depicts the control tactical mission task. (See ADP 3-0 and ADP 6-0 for more information on
  command and control.)
  COUNTERRECONNAISSANCE
  B-21. Counterreconnaissance is a tactical mission task that encompasses all measures taken by a unit
  to counter enemy reconnaissance and surveillance efforts. Counterreconnaissance is not a distinct
  mission, but a component of all security operations and local security measures. It prevents hostile
  observation of a force or area. It involves both active and passive elements and includes combat action to
  destroy or repel enemy reconnaissance units and surveillance assets, such as unmanned aircraft systems.
  B-22. Destroying enemy ground and aerial reconnaissance assets while denying the enemy information
  through other collection systems allows friendly force commanders to operate against an enemy who is
  operating blindly. The enemy commander’s inability to see the battlefield eventually desynchronizes the
  enemy commander’s actions and renders that commander’s force vulnerable to aggressive action by friendly
  forces. (See Chapter 13 for additional information on counterreconnaissance.)
  DESTROY
  B-23. Destroy is a tactical mission task that physically renders an
  enemy force combat-ineffective until it is reconstituted.
  Alternatively, to destroy a combat system is to damage it so badly that it
  cannot perform any function or be restored to a usable condition without
  being entirely rebuilt. The amount of damage needed to render a unit
  combat ineffective depends on the unit’s type, discipline, and morale.
  Destroying armored or dug in targets with area fire weapons requires
  considerable ammunition and time, so forces do not normally attempt it
  unless they have terminally guided munitions. Figure B-11 depicts the
  destroy tactical mission task.
  Figure B-11. Destroy task