text: Division Roles, Functions, and Organizations
  Of transitioning from a division headquarters to an ARFOR headquarters, absorbing the
  responsibilities and the broader horizons expected of an ARFOR headquarters, was really
  a demand that was truly a challenge.
  Major General Stephen L. Arnold
  Cited in Operation RESTORE HOPE Oral History Interview
  5-11. The role of the ARFOR is significantly more diverse and broad than a division operating as a tactical
  headquarters as part of a corps. When serving as an ARFOR, a division continues to perform all of the
  functions of a tactical headquarters and—
  * ASOS.
  * ADCON of all Army forces in the JTF, including those subordinate to other components.
  * Service-specific matters involving administration and support of Army forces.
  * Common-user logistics.
  * Providing Army executive agent support to unified action partners in the AO.
  5-12. The ARFOR focuses on tactical operations in its AO and providing operational-level support to U.S.
  forces and others through the JOA. The ARFOR participates in operational planning and decision making
  for force provision and deployment, fires, sustainment, and force protection. (For additional information on
  ARFOR see Appendix B.)
  DIVISION AS JOINT FORCE LAND COMPONENT COMMAND
  5-13. The JFC may organize a JTF with a division as the joint force land component for limited contingency
  operations. The joint force land component of such a JTF may have TACON of Marine Corps or
  multinational forces. When a Marine Corps’ brigade-size or smaller Marine air-ground task force is under
  control of an Army division, the division employs it as a BCT with unique capabilities. When operating as a
  joint force land component command, a division headquarters receives staff augmentation from the Marine
  Corps and other Services, and individual Army augmentation and communications support from higher
  echelons. When it is the joint force land component, the Army division may also be the ARFOR, although
  this is not optimal because of the potential task saturation that would degrade the overall effectiveness of the
  staff.
  5-14. The division’s higher echelon headquarters—corps, Marine expeditionary force, or combined JTF—
  assesses the additional load placed on the command and control systems of the division headquarters as
  multinational forces come under the division’s control. A division headquarters requires communications and
  personnel augmentation to fill liaison requirements. As the intensity of combat increases, the higher echelon
  headquarters should assess the span of control of any division commanding multiple multinational brigade
  equivalents.
  5-15. When the division serves as a joint force land component command, it has all the functions of a tactical
  headquarters, plus the additional functions of—
  * Setting the land JOA.
  * Assessing the threat in the land JOA.
  * Developing the joint land operations plan.
  * Receiving and employing the land force.
  * Contributing to operation or campaign success.
  * Coordinating with other component and functional commands.
  (See JP 3-31 for additional information on joint force land component commands.)