text: Armies
  sustainment support in the operational area. (See ATP 3-93 for more information on supporting operational
  areas.)
  Reception, Staging, Onward Movement, and Integration
  3-34. Reception, staging, onward movement, and integration refers to all the steps and processes of receiving
  forces and their equipment in a theater and all of the activities required for that force to be positioned in a
  tactical assembly area and prepared to conduct operations. The steps of reception, staging, onward movement,
  and integration include—
  * Reception operations including all those functions required to receive and clear personnel,
  equipment, and materiel through the port of debarkation.
  * Staging operations to assemble, temporarily hold, and organize arriving personnel, equipment, and
  materiel into forces and capabilities. Staging also prepares forces for onward movement, tactical
  operations, or Service reintegration if the theater army is supporting other Services.
  * Onward movement as the process of moving forces, capabilities, and accompanying materiel from
  reception facilities, marshalling areas, and staging areas to tactical assembly areas at which time
  they come under OPCON to the ARFOR in the JOA.
  * Integration as the synchronized transfer of capabilities into the ARFOR, in the JOA, prior to the
  mission.
  Force Tailoring
  3-35. Tailoring a force is a combination of two requirements: selecting the right forces and deploying those
  forces in an effective force flow. As an ASCC, the theater army plays a critical role in the success of force
  tailoring. Through collaboration and analysis, the ASCC recommends the allocation and employment of
  Army forces to the geographic combatant command. The result of the theater army’s efforts is a force package
  matched to the needs of the combatant commander. (See Chapter 2 for more information on force tailoring.)
  Force Protection
  3-36. The Unified Command Plan directs force protection responsibility for all 10 USC DOD forces
  stationed in, operating in, residing in, or transiting an AOR to the GCC. This responsibility will usually go
  to the theater army commander for all Army forces in the AOR. The tasks of the theater army include the
  exercise of TACON over 10 USC Army forces stationed in, operating in, residing in, or transiting the AOR.
  Since there is not an Army theater-level protection command, staff responsibilities for planning and oversight
  falls entirely on the theater army staff. If a JFLCC or joint security coordinator is required, the GCC normally
  assigns that responsibility to the theater army commander.
  3-37. In addition to assets that provide protection, such as CBRN and EOD units, the theater army staff
  focuses on two enablers of protection: command and control and sustainment. The theater requirements for
  air and missile defense, for example, often exceed the capabilities available. Therefore, as the force is tailored,
  the theater army staff coordinates with the GCC and is supported by the GCC’s aligned air and missile defense
  command. The theater army staff estimates the command and control and sustainment assets necessary for
  both the campaign and an increased threat across the AOR. The theater army staff also requests forces to
  meet the combatant commander’s priorities. Through these activities, the ASCC provides the best protection
  available. (See ATP 3-93 for more information on protection enablers.)
  Provide Sustainment Support in an Operational Area
  3-38. The theater army provides the GCC with sustainment capabilities to support a subordinate OA. With
  the initial deployment of forces, the theater army tailors its organization to provide the required support to
  joint operations. The theater army’s support function has a major impact on the design and conduct of joint
  operations. The theater army must get the right Army forces to the right place at the right time to enable the
  GCC to concentrate forces and logistics to generate decisive combat power.
  3-39. The theater army is closely involved with decisions concerning competing demands for limited
  resources. It assists the combatant command in developing support priorities, including those affecting other