text: Chapter 8
  8-61. Another method of engaging an advancing enemy force uses the simultaneous employment of all
  weapon systems. This method can draw more enemy forces into an engagement area before firing, preventing
  forces further back from bypassing and resulting in a greater shock effect and more kills on first engagement.
  However, the engagement occurs at a much closer range, and the mass and momentum of attacking enemy
  forces may still carry them into friendly positions. This method is ideal for use in situations where parts of
  the attacking enemy force are isolated from the direct fire support of the rest of the enemy force. This might
  occur when employing a reverse slope defense or defending from an attacking enemy element that is
  considerably smaller or possesses significantly less lethal capabilities than the defending force. In this case,
  the defending unit entices the majority of the attacking enemy force to enter friendly engagement areas.
  Armored and Stryker Forces
  8-62. When most of a defending force consists of units equipped with armored combat vehicles, units
  conduct a defense designed to take advantage of the tactical mobility and protection offered by them. Combat
  vehicles provide defending forces with the capability to maneuver and delay the advance of an enemy force
  and then immediately change from a delay to a mobile defense or counterattack. Forces equipped with
  armored combat vehicles are well suited for use as security and MBA forces. Armored and Stryker forces are
  better suited for operations within a CBRN environment than dismounted infantry forces are because of their
  organic collective protection systems.
  Dismounted Infantry Forces
  8-63. When facing enemy dismounted forces, units deploy and use defending dismounted infantry forces in
  the same way as they use defending armored and Stryker forces against enemy armored and motorized forces.
  Dismounted infantry forces facing an armored enemy force are primarily used in static roles within the MBA
  or in security roles in the echelon support area. They are also most effective when fighting from prepared
  defenses or in restricted terrain, such as swamps, woods, hilly and mountainous areas, and urban areas.
  Dismounted infantry forces can take advantage of their stealth and ability to move through restrictive terrain
  to place weapon systems in unexpected locations undetected. However, they are far more vulnerable than
  armored forces to direct and indirect fires, especially when away from prepared defenses and overhead cover.
  8-64. Units use airborne and air assault units in the same manner as other dismounted forces once they deploy
  into their drop zones or landing zones. However, there may be problems in extracting a committed airborne
  or air assault force, particularly if it is in direct contact with the enemy. Use of an airborne force in a reserve
  role requires its proximity to readily available certified airdrop crews and aircraft and is therefore generally
  unsuited as a reserve. Because of its inherent mobility and potential reaction speed, an air assault force is
  often well suited for a reserve role during the conduct of the defense, but also faces restrictions based on
  weather. Their role as a dismounted reserve might include the following tasks:
  * Rapid reinforcement of a threatened position.
  * Establishment of a blocking position, possibly in conjunction with existing defensive positions.
  * Echelon support area security operations, such as containment of an enemy airborne or air assault.
  * Reinforcement of encircled friendly forces.
  * Flank protection.
  Aviation Forces
  8-65. Aviation forces—rotary, fixed wing, and unmanned aircraft systems—are particularly valuable in the
  defense because of their speed, mobility, and versatility. Their tasks can include—
  * Reconnaissance and security operations.
  * Disrupting, destroying, and delaying enemy forces in the deep and close areas.
  * Counterattacks and spoiling attacks.
  * Controlling the ground for limited periods where a unit does not wish to commit ground forces
  irrevocably (for example, forward of an executed obstacle).
  * Closing gaps in a defense plan before the arrival of ground maneuver forces.
  * Defeating enemy penetrations.