text: Corps Roles, Functions, and Organizations
  Figure 4-1. Example of a corps and available enablers
  Divisions
  4-43. Divisions are tactical units of execution for a corps. A division’s primary role is as a tactical
  headquarters commanding brigades during decisive action. A division combines offensive, defensive, and
  either stability or defense support of civil authorities tasks in an AO assigned by its higher echelon
  headquarters, normally a corps. It task-organizes its subordinate forces to accomplish its mission. During
  large-scale combat operations, a division operates as a formation. Divisions have both operational and
  administrative responsibilities. See Chapter 5 of this manual for more information on the division.
  Brigade Combat Team
  4-44. BCTs are normally subordinate units for a division; however, a corps may hold a BCT or similar
  organization for a specific role, such as the corps reserve or area security. BCTs are versatile, modular
  organizations with inherent capabilities that make them effective in any environment. There are three types
  of BCTs: armored, infantry, and Stryker. BCTs maneuver against, close with, and destroy enemy forces.
  BCTs have organic combined arms capabilities, including battalion-sized maneuver, field artillery,
  reconnaissance, and sustainment units. Each BCT has organic medical support.
  4-45. A BCT has organic capabilities across the warfighting functions. These capabilities are scalable to
  meet mission requirements. Organic BCT capabilities include maneuver, field artillery, intelligence, signal,
  engineer, CBRN, and sustainment capabilities. The capabilities enable BCTs to operate independently for up
  to three days depending on the mission.
  4-46. A higher echelon commander can task-organize a BCT by adding or subtracting smaller units and
  capabilities through the use of command and support relationships. Higher echelon commanders may
  augment BCTs with additional combat power for specific missions. Augmentation might include aviation,