text: Fire Support in Depth During Large-Scale Combat Operations
  RECONSTITUTION OPERATIONS
  6-171. The scale, complexity, and increased destructive power of large-scale combat operations assumes
  an all-encompassing fight, potentially resulting in the greater loss of personnel, weapon platforms, supplies,
  and equipment of our warfighting formations. Under exceptional conditions, with severely degraded units,
  constrained time, and limited or no personnel replacements, commanders may make the decision to execute
  reconstitution. Reconstitution must be planned and resourced from the beginning of any operation. The
  commander directing the reconstitution mission uses assets under their control, along with those provided by
  higher echelons.
  6-172. Reconstitution of organizations will likely occur in the rear area. The maneuver unit assigned
  responsibility for the rear area is primarily concerned with defeating bypassed forces but must be prepared
  to facilitate reconstitution operations. This includes training replacement personnel, receiving equipment,
  and integrating with civil authority operations.
  6-173. Reconstitution consists of two major elements-reorganization and regeneration. Reorganization is
  the expedient cross-leveling of internal resources within an attrited unit in place to restore necessary combat
  effectiveness as directed by the unit commander. Regeneration is the intentional restoration of a unit's combat
  power that requires time and resource intensive operations which includes equipment repairs or replacements,
  supply replenishment, mission essential training, and personnel replacements in accordance with theater
  commander guidance. Reorganization may include such measures as:
  * Cross-leveling equipment and personnel.
  * Matching operational weapons systems with crews.
  * Forming composite units (joining two or more degraded units to form a single mission-capable
  unit).
  6-174. Immediate reorganization is the rapid and usually temporary restoration of attrited units to minimum
  levels of effectiveness. Normally, the commander implements immediate reorganization in the combat
  position or as close to that site as possible to meet near-term needs. Immediate reorganization consists of
  cross-leveling personnel and equipment, matching weapon systems to crews, or forming composite units
  (joining two or more attrited units to form a single mission capable unit) (for more information see FM 4-0).
  6-175. Deliberate reorganization is conducted when more time and resources are available. It usually occurs
  farther away from hostile activity than immediate reorganization. Procedures are similar to those for
  immediate reorganization; however, some replacement resources may be available. Also, equipment repair
  is more intensive and more extensive cross-leveling is possible (for more information see FM 4-0).
  6-176. Regeneration is the intentional restoration of a unit's combat power and is considerably more
  resource-intensive than reorganization. Regeneration is also time-intensive and normally requires days to
  weeks to execute. It requires large-scale replacement of personnel, equipment, and supplies. Regeneration
  involves reestablishing or replacing the chain of command and conducting mission-essential training to get
  the regenerated unit to a required readiness standard. Because of the intensive nature of regeneration, it occurs
  at a designated regeneration site after the unit disengages from combat operations. The regeneration site is
  normally situated in a relatively secure location away from the battlefield, but still most conducive to
  regenerate combat power under the constraints of time and geography (for more information see FM 4-0).
  6-177. Regeneration is a deliberate operation to rebuild the unit. It is directed by a higher commander that
  has the resources to accomplish the mission, often two or more echelons above the attrited element. Unit
  leadership and cohesion will be preserved when it is possible. The regeneration operation will always include
  a training program to focus on essential collective tasks to obtain a specific level of combat effectiveness for
  the upcoming mission.