text: Chapter 1
  support to, a multinational headquarters, but they remain subject to U.S. command. The ARFOR retains
  ADCON over all Army units under multinational command. The ARFOR and its associated sustainment
  command often provide support to multinational forces. The combatant commander normally provides a
  formal agreement negotiated between the multinational forces and the U.S. forces, based on agreements
  concluded at the national level. (See JP 3-16 for more information on multinational commands.)
  SUSTAINMENT
  1-108. Recent changes in sustainment doctrine have revised the Army’s sustainment concept. Each echelon
  of command has a command relationship with a sustainment headquarters to support large-scale combat
  operations. Every theater army has an assigned theater sustainment command (TSC). Field armies and corps
  have an assigned or attached expeditionary sustainment command (ESC). Divisions have an assigned division
  sustainment brigade. These units will typically have a general support relationship with all of the subordinate
  units in the command. Each of these headquarters will be task-organized with subordinate units based on
  support requirements. TSCs, ESCs, and division sustainment brigades all execute six core missions:
  * Assist the logistics directorate of a joint staff (known as J-4) or the assistant chief of staff, logistics
  (G-4) in determining sustainment requirements and developing the concept of support through
  parallel planning.
  * Manage sustainment operations at each echelon.
  * Provide general support to units assigned to the rear area. Additionally, sustainment units may be
  tasked to support units passing through an operational area.
  * Provide direct support to units operating in the subordinate maneuver unit AOs.
  * Provide general support to all subordinate units of the command.
  * Integrate and synchronize all sustainment functions, including medical support, throughout an
  operational area.
  (See FM 4-0, ATP 4-91, ATP 4-71, and ATP 4-93 for additional information on echelon sustainment.)
  MEDICAL SUPPORT
  1-109. The medical command (deployment support) (MEDCOM [DS]) is the senior medical command in
  a theater, and it is assigned to an ASCC to support large-scale combat operations. The MEDCOM (DS) will
  receive medical brigades, multifunctional medical battalions, and hospital centers based on the force structure
  and staff estimates. The MEDCOM (DS) provides health service support and force health protection to
  tactical commanders at echelons above brigade. Medical units are typically in a command relationship with
  the MEDCOM (DS) and a supporting relationship with maneuver commands. Based on the theater concept
  of medical support, the MEDCOM (DS), medical brigade, and multifunctional medical battalions coordinate
  with the surgeon’s cells from battalion through ASCC level to provide Army health support. The sustainment
  command is responsible for the integration and synchronization of sustainment in the AOR. Medical
  commands are responsible for command and control, integration, synchronization, and execution of Army
  Health System support in the AOR. These medical units work with the surgeon’s cells and sustainment
  commands at each echelon to integrate the concept of medical support with the overall concept of support
  for that maneuver unit. Medical units are not placed in a command relationship with the sustainment
  headquarters. (See figure 1-7 for an example of what this sustainment and medical structure could look like
  in large-scale combat operations.)