text: Chapter 3
  staff weather officer, subordinate and supporting unit FSE representatives, SOF representative, targeting
  officers, chief of staff, FAB and DIVARTY S-2s, S-3s, S-4s, S-6s. Assigned and attached combined arms
  units that comprise or support the command will participate when possible. Normally, the chief of staff directs
  the rehearsal using a synchronization matrix or execution checklist; the FSCOORD or DFSCOORD, should
  use the fire support execution matrix.
  3-87. Usually, the combined arms rehearsal takes place after the Joint Targeting Cycle and Army Targeting
  Process have commenced. Much of the FS Plan for the operation will be refined based on the ongoing
  Targeting Cycle to include HPTs, TAIs, ISR plan and allocation, AI nominations, CAS allocations, Priorities
  of Fire, FSCMS ACMs, and overall scheme of fires.
  3-88. For each phase or time period discussed at the combined arms rehearsal, the FSCOORD should ensure
  the following are integrated:
  * EFSTs.
  * HPTs and TAIs.
  * Trigger points for each target and the target engagement criteria.
  * Target Acquisition resources and allocation for each HPT/TAI.
  * Communications plan for each TA resource.
  * Attack guidance, such as unit(s) to fire, shell and fuze combination, and number of volleys,
  specified for each target.
  * Alternate method of attack when GPS enabled weapons are primary and the area becomes denied,
  degraded, and disrupted.
  * FSCMs and ACMs including triggers for moving FSCMs.
  * Priorities of fire.
  * Fire support attack/delivery systems (lethal and nonlethal) available and allocated for each
  HPT/TAI.
  * Rear Area FS plan.
  * CAS, AI, and SCAR apportionment, allocation, and request processes.
  FIRE SUPPORT REHEARSAL
  3-89. The FS rehearsal is a support rehearsal. It should occur before the combined arms rehearsal and ensure
  the integration and synchronization of the fire support effort with the information collection plan, unit
  airspace plan, and the supported commander’s plan. As with the combined arms rehearsal, the FS rehearsal
  likely occurs after the initiation of the targeting process. Fire support rehearsals are more detailed than the
  combined arms rehearsal and serve to refine the fire support plan and fire support execution matrix with the
  supported unit and prove the feasibility of executing EFSTs. If it is held before the combined arms rehearsal,
  changes from the combined arms rehearsal may require a second FS rehearsal. A fire support rehearsal may
  include all key supported and fire support personnel involved in planning and executing the fire support plan,
  to include the supporting FA unit CPs, the corps or division commander or his deputies, FSCOORD,
  DFSCOORD, JAGIC personnel, chief of staff, the G-3, the G-2, the G-4, the G-6, staff judge advocate (SJA),
  targeting officer, ALO, TACP representative, the FAIO, and liaison officers. There is also a requirement for
  SOF representation, FSOs, and unified action partners as necessary. For more information on FS rehearsals
  see FM 6-0, ATP 3-09.23, ATP 3-09.42, and ATP 3-09.90.
  3-90. The FSCOORD ensures the following are discussed during the FS rehearsal:
  * A clear understanding of the supported commander's intent and guidance for FS.
  * Establishment of TAIs, NAIs, and HPTs that allow for targeting against specific enemy formations
  in accordance with the commander's targeting guidance (information collection plan).
  * Airspace integration requirements such as ACMs affecting fires, ensuring FSCMs are added to the
  unit airspace plan, clearance of fires procedures above and below the coordinating altitude.
  * Allocated primary and alternate TA and FS attack and delivery capabilities for each TA.
  * A clear understanding of the scheme of fires.
  * A clear understanding of the ROE and procedures for clearing fires.