text: Armies
  cases, a brigade is assigned to an Army command and attached to the theater army. In other cases, the theater
  army has a brigade instead of a full command. In each case, the attached command or brigade is committed
  to the supported theater army and is integrated in all theater planning.
  Figure 3-1. Example of theater commands and brigades
  Theater Sustainment Command
  3-56. The TSC is the Army’s senior logistics headquarters within the AOR. The TSC concentrates on
  strategic- and operational-level sustainment support and management. When directed, the TSC provides lead
  service sustainment and executive agency support for designated logistics and services to other government
  agencies, multinational forces, and nongovernmental organizations.
  3-57. The command ensures sustainment flow from strategic deployment, distribution, and sustainment
  partners is accurate, timely, and adequate to support the actions of the theater sustainment forces. Figure 3-2
  depicts a TSC assigned to an ASCC. (See ADP 4-0 and FM 4-0 for additional information on sustainment.)
  Figure 3-2. Theater sustainment force