text: Signal Support by Army Echelon, Core Competencies, Training, and the Army Network
  SECURITY FORCE ASSISTANCE BRIGADE
  2-42. Each security force assistance brigade, both armored and infantry variants, has two maneuver
  battalions, a cavalry squadron, a field artillery battalion, an engineer battalion, a military intelligence
  company, a signal company, a support battalion, and a headquarters and headquarters company (ATP 3-96.1).
  Brigade S-6
  2-43. The S-6 advises the commander on all matters related to communications in the brigade. The S-6
  advises the commander, staff, and subordinate commanders on technical and training issues related to
  network and information service integration. The S-6 plans and coordinates signal support to the brigade’s
  main and tactical command posts through the military decision-making process (see appendix B). The S-6
  collaborates with subordinate battalion S-6s and supported unit to ensure adequate network support. See
  appendix B for more information about collaboration with higher and subordinate signal elements.
  Brigade Signal Company
  2-44. The signal company provides voice and data retransmission capability for its tactical radio network.
  The retransmission team provides line of sight extension of the brigade’s tactical radio network within the
  brigade area of operations. During deployment, the signal company uses augmented assets from the
  expeditionary signal battalion to provide worldwide digital voice and data communications to enable
  command and control across the brigade’s area of operations.
  Battalion S-6
  2-45. The battalion S-6 coordinates with the brigade S-6 to define communications and network support
  requirements, based on the situation and mission. The operational chain of command validates requests for
  signal support they cannot source internally and forwards them to United States Army Forces Command for
  approval and resourcing. The supporting signal unit provides a communications package tailored to validated
  communications and information exchange requirements.
  UNITS WITHOUT ORGANIC SIGNAL ASSETS
  2-46. Theater tactical signal brigades and their assigned expeditionary signal battalions, are manned, trained,
  and equipped to provide communications support to expeditionary units with no organic signal assets. See
  paragraph 2-57 for more information about the theater tactical signal brigade.
  THEATER ARMY
  2-47. The theater army is the Army Service component command to a geographic combatant command. The
  theater army headquarters—
  * Exercises administrative control of all Army forces in the geographic combatant command area
  of responsibility.
  * Integrates Army forces into theater engagement plans.
  * Provides Army support to joint, interorganizational, and multinational forces, as directed by the
  geographic combatant commander.
  2-48. The theater army main command post conducts routine day-to-day operations and crisis action
  planning. With augmentation, the contingency command post can deploy to conduct small-scale operations,
  commanding up to two brigade combat teams or equivalent for up to 30 days.
  2-49. The theater army is designated as the DOD executive agent for setting and supporting the theater
  communications and network architecture. The theater army executes these executive agent responsibilities
  primarily through a signal command (theater) [SC(T)] assigned to support the area of responsibility
  (ATP 3-93). Each Service component in a joint task force maintains its own networked communications
  infrastructure, compatible with the other unified action partners. The J-6 exercises staff oversight over the
  Service component systems in the joint force. The Service components may need to provide staffing or
  equipment augmentation for the joint task force J-6 section.