text: Appendix C
  * Maintaining freedom of maneuver for friendly forces through the AO.
  C-28. Rear area operations are planned in the main command post, but they are controlled by the rear
  command post. Normally, corps and division commanders will designate a deputy commander responsible
  for coordinating these operations. What authorities are designated to the rear command post need to be
  established in unit standard operating procedures or identified in the base operations order and updated as
  necessary in subsequent fragmentary orders. (See ATP 3-94.2 for more information on rear area operations.)
  SUPPORT AREA
  C-29. A support area is the portion of the commander’s area of operations that is designated to facilitate the
  positioning, employment, and protection of base sustainment assets required to sustain, enable, and control
  operations (ADP 3-0). Commanders assign a support area as a subordinate area of operations to support
  functions. In a division or corps support area, a designated unit such as a BCT or MEB, provides
  reconnaissance; area security; terrain management; movement control; mobility support; clearance of fires;
  CBRN operations; and required tactical combat forces. This allows sustainment units to focus on their
  primary functions.
  Defining the Support Area
  C-30. Corps and divisions are likely to designate support areas beyond the JSA, while armies are not. The
  headquarters that establishes the support area is the one that orchestrates the sustainment and protection tasks
  essential to ensuring freedom of action in the deep and close areas. It will orchestrate movement and terrain
  management, protection of sustainment assets, and planning to support continuous operations. These
  headquarters will control movement short of their subordinates’ boundaries and allocate resources. Planning
  in the support area largely influences current and future operations in the deep, close, and consolidation areas.
  Support areas are generally positioned out of range of most of the enemy’s weapons systems when possible.
  However, security considerations must be balanced with maintaining responsiveness to subordinate units
  conducting close and deep operations.
  C-31. The field army support area is usually in the JSA. The JSA is a specific area, designated by the JFC,
  to facilitate protection of joint bases and their connecting lines of communications that support joint
  operations. It performs the same functions as the other support areas; the main difference is that Army forces
  may only be tenants instead of in control of it. The field army may not have a command or support
  relationship with the unit tasked to command and control the JSA. Field army planning in the JSA largely
  influences current and future operations in its deep area. It also influences the conduct of corps operations in
  the close and consolidation areas through the allocation of resources. The field army's temporal horizon for
  sustainment planning is from 96 hours out to 9 days in large-scale combat operations.
  C-32. Corps support areas often contain subordinate division support areas that have not yet displaced
  forward during offensive operations or are positioned out of the range of enemy long-range fires during
  defensive operations. Some corps controlled activities co-locate in subordinate division AOs to facilitate
  better support. Corps planning in the support area largely influences current and future operations in the deep,
  close, and consolidation areas. Their temporal horizon for sustainment planning is from 72 hours out to 6 days
  in large-scale combat operations.
  C-33. Division support areas include assigned division assets and additional corps assets that may be
  co-located to facilitate the conduct of operations. Units in the division support area will conduct those tasks
  essential to ensuring freedom of action in the division deep and close area. They will also provide limited
  support to division consolidation areas when they are established. The division headquarters controls
  movement short of the BCT boundaries. The division headquarters orchestrate the movement and terrain
  management in the division support area, the protection of sustainment assets, and planning to support
  continuous operations. The division headquarters temporal horizon for sustainment planning is 48–96 hours
  in large-scale combat operations.
  C-34. Field army, corps, and division commanders position critical sustainment, command and control, and
  protection capabilities in the support area. These capabilities are focused on enabling close operations,
  supporting operations in the consolidation area, supporting deep operations, and setting the conditions so that
  formations can exploit windows of opportunity during operations. Commanders may also chose to co-locate