text: Division Roles, Functions, and Organizations
  5-43. The division sustainment brigade and its subordinate units provide general support to all units assigned
  and attached to the division as directed by the division commander. The division sustainment brigade
  coordinates and synchronizes tactical-level sustainment operations to meet current and future operations. The
  division sustainment brigade is dependent on the division staff for long-range planning capability. Depending
  on the operational and mission variables, the division sustainment brigade can command up to seven
  battalions. A division sustainment brigade includes an organic division special troops battalion and an organic
  division sustainment support battalion to support tactical-level sustainment operations. Additional modular
  combat sustainment support battalions and companies will need to be attached to a division sustainment
  brigade to sustain large-scale combat operations. (See FM 4-0 for more details on division sustainment
  brigades.)
  Division Artillery
  5-44. A DIVARTY is a brigade-level command assigned to each division that plans, prepares, executes, and
  assesses fires for a division. The DIVARTY commander is the fire support coordinator for the division and
  is also the primary advisor to the division commander for the fires warfighting function. The division artillery
  brigade can also serve as the division’s force field artillery headquarters as required.
  5-45. The DIVARTY is not allocated organic firing units, but is task-organized, from corps- or theater-level
  field artillery brigades, with additional units based on mission requirements. The DIVARTY command post
  provides the division with the ability to have an alternate command post, and it can perform command and
  control functions for a limited time. (See ATP 3-09.90 for more details on the DIVARTY.)
  Combat Aviation Brigade
  5-46. A combat aviation brigade is organized to synchronize operations of multiple aviation squadrons,
  battalions, and joint aviation units. The core competencies of the combat aviation brigade are to provide
  accurate and timely information collection; provide reaction time and maneuver space; destroy, defeat,
  disrupt, or delay enemy forces; air assault maneuver forces; position personnel, supplies, and equipment;
  evacuate casualties and conduct personnel recovery; and enable command and control in support of the
  combined arms team. A division is usually assigned a combat aviation brigade.
  5-47. A combat aviation brigade consists of a headquarters and headquarters company, an air cavalry
  squadron, an attack helicopter battalion, an assault helicopter battalion, a general support aviation battalion,
  and an aviation support battalion. A combat aviation brigade is modular and tailorable, and it is typically
  task-organized as required to support offensive, defensive, and stability operations in support of ground
  maneuver forces. A combat aviation brigade may split into four aviation maneuver battalion or squadron task
  forces, and one aviation support battalion. It can also operate the subordinate battalions as organic
  organizations. A combat aviation brigade can receive two additional aviation battalion or squadron task forces
  without staff augmentation, but it will require additional maintenance personnel and equipment. A combat
  aviation brigade can also be task-organized with ground maneuver, joint aviation, and other non-aviation
  joint and Army units.
  Main Command Post-Operational Detachment
  5-48. The main command post-operational detachment is a unit that augments the division staff with a
  collection of specialists from the National Guard or Reserves during both training exercises and deployments.
  Nine of the Army’s divisions have a National Guard main command post operational detachment. However,
  the 25th Infantry Division has a reserve main command post-operational detachment. The 2d Infantry
  Division does not have a main command post-operational detachment.
  PROVIDED FORCES
  5-49. Based on the division’s role and mission, it can receive a variety of forces to assist it in matching
  capabilities to requirements. The most common of the provided forces are rocket or cannon battalions from
  a field artillery brigade; an expeditionary-combat aviation brigade or subordinate battalions; a MEB; a
  military police battalion; an intelligence and electronic warfare battalion from the corps
  expeditionary-military intelligence brigade; civil affairs battalion; EOD battalion; CBRN battalion; tactical