text: Sustainment
  operations for an ASCC including all Army forces forward-stationed, transiting, or operating within the AOR.
  The TSC coordinates Title 10, Army support to other Services, Department of Defense executive agent, and
  lead service responsibilities across the entire theater. Figure 9-4 depicts a notional taskorganized TSC.
  Figure 9-4. Notional task organized theater sustainment command
  Expeditionary Sustainment Command
  9-168. At the theater echelon, one or more ESCs are attached to a TSC. The ESC attached to a TSC
  commands and controls all assigned and attached units in an operational area as directed by the TSC
  commander. A task organized ESC attached to a TSC normally includes one or more sustainment brigades,
  a transportation brigade expeditionary, and a movement control battalion to support theater opening, theater
  distribution, and theater closing operations. The ESC plans for near term operations and synchronizes
  operational-level sustainment operations to meet the current and future operational requirements of the TSC.
  It may perform as a forward CP for the TSC if directed. The ESC attached to a TSC is dependent on the TSC
  staff for long-range planning capability and enabling capabilities like signal support. The ESC and its
  subordinate units must be able to move and displace at the pace of large-scale combat operations. (For more
  information on the ESC, see ATP 4-94. For more information on the sustainment brigade, see ATP 4-93.)
  SUSTAINING THE CORPS
  9-169. An ESC is assigned to the corps. The ESC is the corps’ command for the integration and
  synchronization of sustainment in an operational area. The ESC assists the corps sustainment cell with
  planning and coordinating sustainment. The corps’ ESC and its subordinate task organized functional and
  multifunctional sustainment units provide general support for all units in the corps area of operations as
  directedby the corps commander. A task organized ESC assigned to a corps normally includesenablers that
  include a corps logistics support element, petroleum group, movement control battalion, and one or more
  sustainment brigades task organized with combat sustainment support battalions (CSSBs) to support
  sustainment operations. The corps’ echelon above brigade sustainment is dependent on the corps units for
  medical support, signal support, intelligence, long-range surveillance and reconnaissance, fires, protection
  (engineer support and route security), and strategic partner planning capability for field maintenance support.