text: Chapter 1
  Figure 1-7. Notional theater sustainment command structure
  1-64. As required by METT-TC, the TSC may extend its operational reach by deploying multiple ESCs or
  sustainment brigades into specified operational areas in order to more effectively provide responsive
  support to Army forces. ESCs can serve as forward headquarters of the TSC and provide mission command
  for theater opening, theater distribution, and theater sustainment on an area basis within and between
  specified operational areas. Depending on the command structure within the theater, ESCs and SUST
  BDEs may be employed to support specific Army forces within a specific operational area, or to support
  other ESCs or SUST BDEs with theater opening, theater distribution, and/or theater sustainment
  capabilities.
  1-65. The TSC headquarters provides multifunctional sustainment: supply, maintenance, transportation,
  field services, FM, and human resources. The headquarters is geographically focused and globally
  employable. The TSC commands and controls Army operational-level sustainment (less health service
  support) in support of a joint or multinational force; and decentralized execution of sustainment operations
  throughout the theater. Its subordinate units are assigned to a TA. Doctrinally, the headquarters operates
  from fixed facilities in sanctuary and is collocated with the ASCC in order to most effectively perform its
  mission command functions. In many situations, the TSC headquarters will remain static. When required,
  the TSC employs ESCs as forward deployed command posts. The TSC may employ an ESC in this
  capacity to provide a forward mission command presence, improve span of control, or mission command a
  specified function. The combination of these capabilities gives the TSC commander the ability to organize
  and provide tailored support such as theater opening, distribution, support to theater forces, and support for
  redeployment, and retrograde of forces as directed by the theater Army IAW GCC directives and priorities.
  The TSC as well as the ESC has embedded G-8 capability to support funding the subordinate commands
  within the organization.
  Expeditionary Sustainment Command
  1-66. The ESC provides mission command for attached units in an area of operation as defined by the
  TSC. As a deployable command post for the TSC, the ESC provides operational reach and span of control.
  The ESC plans and executes sustainment, distribution, theater opening, and RSOI movement for Army
  forces in unified land operations. The ESC may serve as the basis for an expeditionary joint sustainment
  command when directed by the combatant commander or his designated multinational or JTF commander.
  It normally deploys to the operational area and provides command and control when multiple sustainment
  brigades are employed or when the TSC determines that a forward command presence is required.
  Depending on the command structure within the theater, they may be employed to support specific Army