text: Tactical Mission Tasks
  require that all requests for support from the supported unit to the supporting unit pass through their
  headquarters. Alternatively, in situations where a commander will not be able to maintain control over both
  units, the supporting unit is placed in a standard command relationship with the supported unit, such as
  attached or operational control. An example of this occurs when both units are trying to encircle a
  retrograding enemy force and the commander remains with the direct pressure force.
  FOLLOW AND SUPPORT
  B-42. Follow and support is a tactical mission task in which a
  committed force follows and supports a lead force conducting
  an offensive operation. A follow and support force is not a reserve
  but is a force committed to specific tasks. It contains an arrow
  graphic around the symbol of the unit being assigned this task.
  Figure B-19 depicts the follow and support tactical mission task.
  B-43. Missions of a follow and support force include—
  * Destroying bypassed enemy units when the lead unit
  does not clear the assigned area as it advances.
  Figure B-19. Follow and
  * Blocking movement of enemy reinforcements.
  support task
  * Relieving in place any direct pressure or encircling force
  halted to contain enemy forces.
  * Securing lines of communications.
  * Clearing obstacles.
  * Guarding prisoners, key areas, and installations.
  * Recovering friendly battle losses.
  * Securing key terrain.
  * Controlling dislocated civilians.
  B-44. A commander assigns a unit the task of follow and support to keep the supported force from having to
  commit its combat power to tasks other than the main effort, which would slow the momentum and tempo of
  the offense. The follow and support force accomplishes its tasks to prevent enemy forces, obstacles, and other
  factors from interfering with offensive actions, especially along the lines of communications.
  B-45. A commander assigning the follow and support task has two options in establishing the relationship
  between the supported and the supporting units. A commander can place the follow and support unit in a
  standard command relationship with the supported unit, such as attached or operational control. Alternatively,
  a commander can retain command of the follow and support force and require that all tasking requests from
  the supported unit go through that commander’s headquarters.
  INTERDICT
  B-46. Interdict is a tactical mission task where a unit prevents,
  disrupts, or delays the enemy’s use of an area or route in any
  domain. It is an offensive action that desynchronizes the enemy.
  Interdiction is a supporting effort conducted to complement and
  reinforce other ongoing offensive or defensive operations. The two
  arrows should cross on the unit or location targeted for interdiction. An
  interdiction tasking must specify how long to interdict, defined as a
  length of time or some event that must occur before the interdiction is
  lifted, and the exact effect desired from the interdiction. Figure B-20
  depicts the interdict tactical mission task.
  Figure B-20. Interdict task
  B-47. A friendly force’s capability to interdict may have a devastating
  impact on an enemy force’s plans and ability to respond to friendly actions. For example, interdiction efforts
  that result in an enemy force’s maneuver being delayed or disrupted enhance the friendly force’s ability to
  achieve tactical advantages. Delaying or disrupting enemy resupply efforts limits the enemy force’s ability
  to sustain intense, high tempo offensive or defensive actions and restricts enemy mobility. Space and