text: Corps Roles, Functions, and Organizations
  mobilized from the National Guard, requiring the same planning considerations as the main command post
  operational detachment and MEB.
  Note. The MEB is an integral part of corps’ ability to command and control in the corps support
  areas. The mobilization and deployment of the MEB must be prioritized in corps planning and
  operations to ensure that it arrives as early as possible. Depending upon the situation, corps
  commanders may consider deploying their assigned MEB ahead of their divisional combat power.
  Mobility and Security
  4-20. The corps headquarters has mobility limitations, and it lacks organic security elements. The corps
  headquarters is fully mobile with the exception of intermodal containers, which will require movement
  support from a truck company during command post deployment and employment. During employment, the
  corps headquarters and headquarters battalion normally receives a company-sized element to secure the corps
  headquarters, such as a reinforced military police company or infantry company. However, planners must
  account for the sustainment considerations of these security attachments, particularly their mobility.
  THE CORPS HEADQUARTERS
  4-21. The headquarters and headquarters’ battalion provides the personnel and equipment to support the
  corps command posts and mobile command group. The corps headquarters is manned and equipped to form
  three command posts (main, tactical and rear area) and a mobile command group as needed. A command post
  is a unit headquarters where the commander and staff perform their activities (FM 6-0). Command posts
  assist commanders in the exercise of mission command, helping to control operations through continuity,
  planning, coordinating, and synchronizing warfighting functions. A corps also has the ability to field an early-
  entry command post.
  HEADQUARTERS AND HEADQUARTERS BATTALION
  4-22. A battalion operates as a tactical and administrative headquarters for two organic companies: a
  headquarters and support company and a signal, intelligence, and sustainment company. It also has a Reserve
  Component main command post operational detachment. Each company consists of staff sections which are
  organized into three deployable command posts: the main command post, tactical command post, and rear
  command post. The main command post and the tactical command post are normally co-located with
  elements of the headquarters and headquarters’ battalion providing the administrative and logistics support
  to the command posts.
  4-23. The headquarters battalion staff provides administrative support, human resources, logistic support,
  religious support, and life support to corps headquarters elements. When deployed, the battalion staff sections
  are responsible for unit-level communications support, property accountability, transportation, medical
  support, and maintenance support for the main command post, tactical command post, rear command post,
  and mobile command group. When dictated by terrain or distance, the rear command post may receive area
  support for maintenance and medical support from the corps support area owner.
  4-24. The headquarters support company provides command and control and company-level administration
  and life support to the headquarters and organic maneuver, fires, and protection staff cells. The headquarters
  support company will normally co-locate with the main command post for oversight, coordination, and
  synchronization of administrative and logistic support for assigned, attached, or OPCON units of the main
  command post.
  4-25. The signal, intelligence, and sustainment company headquarters provides command and control and
  limited company-level administration and life support to the organic staff cells. The headquarters also
  provides company-command-level command and control for the signal elements supporting the main
  command post and tactical command post. The signal support elements install, operate, and maintain the
  corps network enterprise in support of 24-hour operations at the main command post and tactical command
  post. The signal, intelligence, and sustainment company headquarters will normally co-locate with the tactical