text: Chapter 1
  * Theater joint force land component command.
  * JTF.
  * Joint or coalition force land component command.
  * Tactical command.
  1-63. Generally, an echelon can perform no more than two of the roles effectively. ASCC and theater joint
  force land component are roles that only the theater army can perform. These roles dictate how each echelon
  internally organizes and trains, which doctrine it uses, and which tasks it performs. Army forces performing
  joint roles require augmentation. (See Chapter 5Appendix D for information on transitioning echelons above
  brigade to a joint headquarters.)
  Army Service Component Command
  1-64. The Army Service component command is the command responsible for recommendations to the joint
  force commander on the allocation and employment of Army forces within a combatant command (JP 3-31).
  ASCC is a Service role. Service component commanders retain responsibility for certain Service-specific
  functions and other matters affecting their forces, including internal administration, personnel support
  training, sustainment (with some exceptions), and Service intelligence operations. There can be only one
  ASCC within the combatant command. This is the primary role of the theater army, the specific designation
  for an operational ASCC assigned to a combatant commander with an AOR. (See Chapter 3 for more
  information on the ASCC.)
  Army Forces Command
  1-65. The ARFOR is the Army component and senior Army headquarters of all Army forces assigned
  or attached to a combatant command, subordinate joint force command, joint functional command,
  or multinational command. The ARFOR is the Army component of any joint force. Army doctrine
  distinguishes, however, between the Army component of a combatant command and that of a joint force
  formed by the combatant commander. The Army component of the combatant command is the ASCC, and
  the Army component of the subordinate joint force is an ARFOR.
  1-66. The role of the ARFOR in a joint operations area (JOA) entails several responsibilities. The ARFOR
  will normally exercise operational control (OPCON) over all Army forces (excluding medical support). It
  identifies requirements, establishes priorities of support for Army forces, and coordinates with the theater
  army for providing sustainment. The ARFOR in a JOA normally provides administrative control (ADCON)
  and Title 10, United States Code (10 USC) authorities and responsibilities for Army forces in the JTF unless
  these responsibilities are modified by the theater army commander. (See Appendix A for more information
  on the ARFOR.)
  1-67. A corps or division tactical command refers to an Army echelon primarily focused on maneuvering
  subordinate units (divisions and BCTs). It is a Service role, but it may have joint or multinational forces
  assigned to it.
  1-68. When performing a Service role, echelons above brigade formations use Army doctrine, techniques,
  and procedures. When performing a joint role, they adhere to joint doctrine, techniques, and procedures.
  When performing a multinational role, leaders use approved multinational doctrine, techniques, and
  procedures to supplement joint or Army doctrine as appropriate. For example, a field army serving as a
  multinational joint force land component commander (JFLCC) under NATO control would use NATO
  standardization agreements (also known as STANAGs), and joint doctrine, techniques, and procedures. A
  corps serving as an ARFOR consisting of U.S., British, and Canadian units would use approved American,
  British, Canadian, Australian, and New Zealand Armies’ Program (also known as ABCANZ) standards to
  supplement U.S. Army doctrine, techniques, and procedures. Likewise, a division serving as a multinational
  tactical command in Korea would use approved Combined Forces Command, Korea techniques and
  procedures to supplement Service-specific doctrine.