2-72. Reconstitution is those actions, including regeneration and reorganization, commanders plan and implement to restore units to a desired level of combat effectiveness commensurate with mission requirements and available resources (JP 3-02). Whereas reorganization is possible at the tactical level, regeneration requires support from higher echelons. Reconstitution is a total process and is not solely a sustainment operation. Commanders perform reconstitution when one or more subordinate units become combat ineffective, or when a commander can raise the combat effectiveness of a subordinate unit by shifting available resources. Reconstitution may include—