text: Chapter 6
  FLEXIBILITY
  6-40. Flexibility is the employment of a versatile mix of capabilities, formations, and equipment for
  conducting operations (ADP 3-0). Defensive operations require flexible plans that anticipate enemy actions
  and allocate resources accordingly. FS must address the need for flexibility and the need to:
  * Allocate initial priority of FA fires to forward security forces.
  * Quickly shift fires to critical points throughout the AO.
  * Execute successive or concurrent programs or fire plans.
  * Rapidly shift fires from support of the defense to support the counterattack and offense.
  * Coordinate and synchronize air support on known, suspected, and likely enemy locations.
  MANEUVER
  6-41. Maneuver allows a defending force to achieve and exploit a position of relative advantage. Even in the
  defense, there are elements of the offense. FS assists defending forces create opportunities to maneuver
  against the attacking force by:
  * Delaying the movement of enemy reserves.
  * Coordinating all means of available FS to delay, destroy, or limit the enemy's advance, and to
  weight the attack(s) of the striking force in a mobile defense.
  * Supporting the obstacle plan by placing fires in front of, on top of, to the side of, and behind
  obstacles to maximize their effect.
  * Providing fires to support the disengagement of maneuver elements and their repositioning to
  subsequent battle positions.
  * Channelizing enemy movement into EAs.
  MASS AND CONCENTRATION
  6-42. Defending forces seek to mass and concentrate fires against enemy forces. This produces
  overwhelming combat power at specific locations to support decisive operations. Concentrating forces
  increases risk of large-scale losses from enemy fires. This risk can be mitigated by using deception and
  employment of FS capabilities. FS considerations for this characteristic of the defense include:
  * Support the rapid destruction of an enemy force when it is most vulnerable or when it is on the
  verge of gaining a significant advantage.
  * Allow a commander to accept prudent risk by using minimal maneuver forces in one area in order
  concentrate forces in another area.
  * Mass fires to create an important demoralizing psychological effect that is not achieved from
  smaller-scale fires.
  * Use fires, TA, and CFZs to protect concentrating friendly forces.
  OPERATIONS IN DEPTH
  6-43. Operations in depth is the simultaneous application of combat power throughout an area of operations
  (ADP 3-90). The HQ FSE plans the employment of available Army and joint fires to achieve depth and
  simultaneity and secure advantages for future operations. This includes disrupting the enemy's approach to
  and movement within the MBA, destroying HPTs, denying, or interrupting vital components of enemy
  operating systems, and using obscurants to conceal friendly movement. They create conditions favorable to
  friendly forces by disrupting enemy long-range fires, sustainment, and enemy C2. The defending commander
  directs the delivery of effects in multiple domains to establish positions of relative advantage necessary for a
  successful counterattack. Operations in depth prevent enemy forces from maintaining their tempo. FS assets
  rapidly and continuously engage enemy forces throughout the operational framework to:
  * Disrupt, delay, and attrit the enemy in the deep area.
  * Destroy enemy long-range fires, ADA sites, and sustainment efforts.
  * Destroy and neutralize enemy sustainment and C2 nodes.
  * Allocate responsive fires to support the decisive operation.