text: Sustainment
  synchronizes and executes logistics support to BCTs and multifunctional support brigades attached to the
  division and non-divisional units operating in the division area of operations.
  Figure 9-7. Notional division sustainment support battalion
  MEDICAL SUPPORT ORGANIZATIONS
  9-177. Battalion medical platoons and the BSMC provide health service support and force health protection
  to BCTs (see paragraphs 9-139through 9-145). The theater Army has a MEDCOM (DS) for command and
  control of all medical units in a theater of operations at echelons above brigade (see paragraph 9-165). The
  MEDCOM (DS) provides subordinate medical organizations that operate under the MEDBDE or medical
  battalion (multifunctional). The MEDBDE provides a scalable expeditionary medical capability for assigned
  and attached medical organizations that are task organized to support BCTs and echelons above brigade. The
  medical battalion (multifunctional) also provides medical command and control, administrative assistance,
  logistical support, and technical supervision for assigned and attached companies and detachments. The
  medical battalion (multifunctional) is assigned to the MEDCOM (DS) or MEDBDE. The hospital center is a
  modular Role 3 medical treatment facility tailored to provide hospitalization support during decisive action
  and serves as the replacement for the current combat support hospital. The hospital center provides essential
  care within the theater evacuation policy to return patients either to duty or stabilization for further evacuation
  to a role 4 medical treatment facility in the continental United Statesor another safe haven. (See ATP4-02.1
  and FM 4-02 for additional information.)
  BRIGADE SUPPORT AREA
  9-178. The brigade support area is a designated area in which sustainment elements locate to provide
  support to a brigade (ATP 4-90). The BSA is the sustainment hub of the supported BCT. The BCT
  commander approves the location of the BSAbased upon recommendations from the BSB commander and
  BCT staff. The BSA is a subset of the larger support area of the BCT, which can encompass a greater terrain
  footprint than the BSA. The support area of a BCT in a contiguous area of operation extends from its rear
  boundary forward to the rear boundary of its battalions. The support area of a BCT typically includes the
  BSA, airfields, lodgments, other battalion rear areas, the BCT alternate CP if required, the BEB, and may
  include areas of operations the BCT has not assigned to a maneuver battalion. In a noncontiguous area of
  operations, the BSA can be a base, base cluster, or sub-set inside the support area of the BCT.
  OPERATIONAL OVERVIEW
  9-179. The BSA is the sustainment (logistics, medical, personnel, and administrative) node for the BCT,
  and is the BSB’s terrain from which to conduct sustainment operations. It consists of the BSB main CP
  (which can also serve as a BCT alternate CP if required), signal assets, and other sustainment units from
  echelons above brigade. The BSB commander is responsible for the command and control of all support
  organizations within the BSA for terrain management and security unless otherwise stated by the operations