text: Command and Support Relationships
  (cid:122) OPCON. (See paragraphs B-8 and B-9.)
  (cid:122) TACON. (See paragraph B-10.)
  Table B-2. Army command relationships
  Then the inherent responsibilities are:
  Authorities
  Unless
  CDR can
  If modified,
  Are Establish/ impose on
  relation- Have May be ADCON assigned Provide maintain Have gaining unit
  ship command task- responsi- position liaison communica priorities further
  relationship organized bility establish
  is— or AO to— -tions command
  with— by— goes -ed by—
  by— with— or support
  through
  relationship
  —
  of—
  Attached;
  Organic Organic Organic OPCON;
  Organic Organic HQ Organic HQ N/A N/A
  HQ HQ HQ TACON; GS;
  GSR; R; DS
  Attached;
  Gaining Gaining Gaining OPCON;
  Assigned Gaining HQ Gaining HQ N/A N/A
  HQ HQ HQ TACON; GS;
  GSR; R; DS
  As Attached;
  Unit to
  Gaining Gaining required Gaining OPCON;
  Attached Gaining HQ Gaining HQ which
  HQ HQ by gaining HQ TACON; GS;
  attached
  HQ GSR; R; DS
  Parent unit
  and gaining
  As As required
  unit; gaining OPCON;
  Gaining required by gaining Gaining
  OPCON Gaining HQ unit may Parent HQ TACON; GS;
  HQ by gaining HQ and HQ
  pass GSR; R; DS
  HQ parent HQ
  OPCON to
  lower HQ
  As As required
  Gaining required by gaining Gaining TACON; GS
  TACON Gaining HQ Parent HQ Parent HQ
  HQ by gaining unit and HQ GSR; R; DS
  HQ parent HQ
  ADCON administrative control GSR general support—reinforcing
  ASCC Army Service component command HQ headquarters
  AO area of operations N/A not applicable
  CDR commander OPCON operational control
  DS direct support R reinforcing
  GS general support TACON tactical control
  Organic
  B-19. Organic forces are those assigned to and forming an essential part of a military organization. For
  example, a brigade engineer battalion is an organic unit in a brigade combat team (BCT). The Army
  establishes organic command relationships through organizational documents such as tables of organization
  and equipment and tables of distribution and allowances. If temporarily task-organized with another
  headquarters, organic units return to the control of their organic headquarters after completing the mission.
  Assigned
  B-20. Army assigned units remain subordinate to the higher echelon headquarters for extended periods,
  typically years. Assignment is based on the needs of the Army, and it is formalized by orders rather than
  organizational documents. Although force tailoring or task-organizing may temporarily detach units, they
  eventually return to either their headquarters of assignment or their organic headquarters. An Army