text: Corps Roles, Functions, and Organizations
  operations, the theater army or field army command and control corps unless the corps is subject to the
  operational control of a JFC subordinate to the GCC. In such cases, the theater army maintains an ADCON
  relationship with the corps due to the theater army’s theater-wide ARFOR responsibilities.
  4-90. During competition, a corps shapes its assigned AO, depending on the role that it is fulfilling. As an
  ARFOR, a corps assists higher echelons in their efforts to set, support, and shape operational areas. Corps do
  so by executing operational-level tasks, collecting information, providing bottom-up refinement to planning,
  and participating in activities to posture the joint and multinational force to prevail in the event that armed
  conflict occurs. During the course of shaping an AO during competition, a higher echelon may invest the
  corps commander with additional authorities or responsibilities to facilitate operations. Key tasks that corps
  may perform to support shaping during competition include—
  * Deploying.
  * Refining and conducting detailed planning for major operations and achieving competition
  objectives.
  * Managing assigned airspace.
  * Executing target development in accordance with joint standards
  * Sustaining Army forces in the assigned AO.
  * Synchronizing protection, including air and missile defense support.
  * Executing security force assistance tasks.
  * Executing operations to achieve competition objectives.
  * Contributing to flexible deterrent options and flexible response options.
  * Transitioning to a joint force land component command or multinational joint force land
  component command.
  * Transitioning to a JTF.
  * Assuming ARFOR and other (as directed) authorities and responsibilities in the operational area.
  * Assuming selected field army tasks, if that echelon is unavailable (see Chapter 3).
  * Redeploying.
  * Conducting training and exercises.