text: Chapter 1
  Figure 1-5. Distribution management center with a theater personnel operations center
  1-56. The ESC’s role is to execute command and control for task-organized units and to plan and synchronize
  current and future sustainment operations to support a corps HQ or an Army force. The ESC HQ is task
  organized with sustainment brigades and functional logistics organizations supporting unified land
  operations. The ESC G-1/AG’s focus is on ESC specific (internal) HR support, while the HROB’s focus is
  the AO in concert with the overall concept of support for sustainment. See ATP 4-94 for more specific
  information on the mission and organization of the ESC.
  1-57. The sustainment brigade is modular and task organized to support theater opening, theater distribution,
  area sustainment, or life support missions. Organic to the sustainment brigade are the brigade HQ and an
  STB. All other assets are task organized to the sustainment brigade to enable it to accomplish its sustainment
  warfighting roles and mission. Sustainment brigades provide command and control and staff supervision of
  life support activities, and distribution management to include movement control as an integral component
  of the theater distribution system. For specific information on the mission, organization, and operations of
  the sustainment brigade, see ATP 4-93, Sustainment Brigade.
  1-58. The DSB is assigned to a division. The DSB is responsible for the integration, synchronization, and
  execution of sustainment operations. The DSB, and its subordinate units, provide direct support to all
  assigned and attached units in an operational area as directed by the division commander and provides general
  support sustainment to non-divisional forces operating in the division AO. A DSB assigned to a division
  includes an organic DSTB and an organic division sustainment support battalion to support tactical-level
  sustainment operations. The DSB and its subordinate units must be able to move and displace at the pace of
  LSCO.
  1-59. The HROB is an organic element within each sustainment brigade, DSB SPO section and ESC DMC.
  As previously discussed, the HROB has the mission to plan current and future operations, coordinate,
  integrate, and assess emplacement and operations of HR elements executing personnel accountability, HR
  support to casualty operations, and postal operations. This includes providing technical assistance to
  supported G-1/AGs and S-1s in personnel accountability, casualty, and postal missions.
  1-60. The establishment of a close relationship between G-1/AGs, S-1s, and the supporting ESC, sustainment
  brigade, or DSB HROB is critical for timely support. The G-1/AG or the S-1 of the organization establishes