Theater Support Command (TSC)
The Theater Army Area Command (TAACOM) is organized to provide combat service support for units located in and passing through the theater zone. The TAACOM, a major subordinate command of the Theater Army headquarters, provides DS and GS support to noncorps units, Joint elements, and allied forces as directed. Additionally, the TAACOM provides GS to the Corps and backup DS to the Corps through the TAACOM's GS units. Four other major subordinate commands of the Theater provide the balance of logistic support: Personnel Command (PERSCOM), Engineer Command (ENCOM), Transportation Command (TRANSCOM), and Medical Command (MEDCOM).
The Theater Support Command (TSC) is a multifunctional support headquarters that works at the operational-level with links to strategic and tactical-level support organizations and agencies. The TSC has some permanently assigned major subordinate units. The centerpiece of the TSC is the distribution management center (DMC), which combines the functions of materiel management and movement. The Logistics Support Element (LSE) and Area Support Groups (ASGs) are subordinate elements of the TSC. The TSC can be easily tailored to best meet the support requirements that can vary considerably depending on the type of operations and the scale of the deployment.
The Army normally executes movement control for EAC at the operational level through a TSC movement control agency (MCA). In some instances, this organization reports to the primary logistics staff officer in the ASCC staff. The TSC MCA helps develop and executes the Army posture of the joint movement program developed by the Joint movement center (JMC). The TSC MCA serves as the primary element for the planning and controlling of transportation operations at the operational level. The TSC MCA synchronizes its operations with those of the JMC, USTRANSCOM, the TSC DMC and lower echelon movement control centers (MCCs).
At the operational level, the TSC's maintenance capability is organized to provide DS and GS maintenance to units in and passing through the AO, to provide DS maintenance support to back up tactical-level organizations, immediate support to aviation units, and to provide sustainment maintenance support for the theater. The support operations supply and maintenance directorate provides planning and policy for maintenance provided by Army maintenance units, maintenance elements under the logistics support element (LSE), and contracted support. The TSC manages Class I, II, III (packaged and bulk), IV, V, VI, VII, and IX supplies, and water. Class IV supply actions are coordinated with the Engineer Command and/or COMARFOR engineer staff. The TSC director of field services exercises staff supervision over field services functions.
The Army developed a modular concept for opening theaters in which the TSC is a critical component. Modularity involves incrementally deploying only the minimum capabilities required to an AO, and the basis for this modular support is called the theater force opening package (TFOP). The TSC early entry module (EEM) provides command and control of many of the elements initially supporting RSO&I.
The Logistics Support Element (LSE) is a forward deployed theater-specific-organization, which performs the U. S. Army Materiel Command (USAMC) tasks of depot maintenance, oil analysis, calibration of test equipment, ammunition surveillance, release of pre-positioned strategic stocks, materiel fielding, technology insertion, and battle damage assessment. USAMC staffs the LSE headquarters while a combination of DOD civilians, contractors, military and host nation personnel flesh out the operational units of the organization. The LSE is OPCON to the TSC and has technical links to USAMC, the US Army Combined Arms Support Command, the Soldier Support Center, DLA, and the Health Care System Support Agency.
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