text: Chapter 4
  4-46. The commander cannot afford to dissipate fires capabilities on secondary priorities before determining
  the enemy's main effort. Less centralized control is essential in an offensive situation because the supported
  force has the initiative and unforeseen opportunities require responsive fires to exploit.
  Never Place Artillery in Reserve
  4-47. Commanders should not place artillery in reserve but may give a change to its support relationship
  ensuring artillery is not held in reserve and adequate support is provided to the main effort. These changes in
  support relationships can be identified by an on-order mission. An example of an on-order mission is "1-52
  FA: GSR 1-50 FA; on-order R 1-50 FA."
  4-48. In addition to never leaving FA in reserve and the FS execution principles of AWIFM-N, FA
  commanders and FS personnel also consider mission, ammunition, and positioning when planning for FA
  system employment. Considerations are:
  * Mission. Appropriate FA unit command support relationships assigned based on the commander's
  intent and the overall situation.
  * Ammunition. Allocate ammunition to provide more support for the main effort. Ensure adequate
  ammunition for future operations through positioning, ammunition restrictions, or CSR
  parameters during execution and planning.
  * Positioning. Continually re-position FA units, ammunition, TA resources, CPs, and assets to best
  support the plan as it is being executed. Assign direction of fire to mass fires in the appropriate
  AO.
  FIELD ARTILLERY INHERENT RESPONSIBILITIES IN ARMY
  COMMAND RELATIONSHIPS
  4-49. FA cannon, rocket, and missile systems that are organic, assigned, attached to, or under the OPCON
  of FABs, DIVARTY, and BCTs provide commanders with continuously available, adjustable, and tailored
  fires under all weather conditions and in all types of terrain. These organizations can be task-organized with
  maneuver or supported unit to provide the right combination of indirect fires capabilities for a given situation.
  4-50. Command relationships provide the basis for ensuring unity of command and unity of effort in
  operations. Command relationships are used in Army force generation, force tailoring, and task-organizing.
  Command relationships define superior and subordinate relationships between unit commanders. By
  specifying a chain of command, command relationships unify effort and enable commanders to use
  subordinate forces with maximum flexibility. Army command relationships identify the degree of control of
  the gaining commander. The type of command relationship often relates to the expected longevity of the
  relationship between the HQ involved and quickly identifies the degree of support that the gaining and losing
  Army commanders provide:
  * Organic is assigned to and forming an essential part of a military organization as listed in its table
  of organization for the Army, Air Force, and Marine Corps, and are assigned to the operating
  forces for the Navy (JP 1, Vol 2).
  * Assign is to place units or personnel in an organization where such placement is relatively
  permanent, and/or where such organization controls and administers the units or personnel for the
  primary function, or greater portion of the functions, of the unit or personnel (JP 3-0).
  * Attach is the placement of units or personnel in an organization where such placement is relatively
  temporary (JP 3-0).
  * Operational control is the authority to perform those functions of command over subordinate
  forces involving organizing and employing commands and forces, assigning tasks, designating
  objectives, and giving authoritative direction necessary to accomplish the mission (JP 1, Vol 2).
  * Tactical control is the authority over forces that is limited to the detailed direction and control of
  movements or maneuvers within the operational area necessary to accomplish missions or tasks
  assigned (JP 1, Vol 2).