text: Command and Support Relationship
  Table B-1. Army command relationships
  Then inherent responsibilities
  Can impose
  Unless Establish
  Have Are on gained
  If relation- May be modified, and Have
  command assigned Provide unit further
  ship is— relation- task ADCON position liaison maintain priorities command or
  organized responsi- communi- establish-
  ship or AO to— support
  by— bility goes cations ed by—
  with— by— relationship
  through— with—
  of—
  All Army HQ
  Attached;
  organic specified
  OPCON;
  forces Organic in Organic Organic
  Organic N/A N/A TACON;
  organized HQ organizin HQ HQ
  GS; GSR;
  with the g
  R; DS
  HQ document
  As
  OPCON As ASCC or
  require As required
  Gaining Gaining Gaining chain of required Service-
  Assigned d by by OPCON
  unit HQ Army HQ comman by assigned
  OPCO HQ
  d OPCON HQ
  N
  As Attached;
  require Unit to OPCON;
  Gaining Gaining Gaining Gaining Gaining
  Attached d by which TACON;
  unit unit Army HQ unit unit
  gaining attached GS; GSR;
  unit R; DS
  Parent
  unit and
  gaining As
  As
  unit; required OPCON;
  require
  Gaining gaining Parent Gaining by gaining Gaining TACON;
  OPCON d by
  unit unit may unit unit unit and unit GS; GSR;
  gaining
  pass parent R; DS
  unit
  OPCON unit
  to lower
  HQ1
  As
  As
  required
  require TACON;
  Gaining Parent Parent Gaining by gaining Gaining
  TACON d by GS; GSR;
  unit unit unit unit unit and unit
  gaining R; DS
  parent
  unit
  unit
  Note. 1In NATO, the gaining unit may not task-organize a multinational force. (See TACON.)
  ADCON administrative control HQ headquarters
  AO area of operations N/A not applicable
  ASCC Army Service component command NATO North Atlantic Treaty Organization
  DS direct support OPCON operation control
  GS general support R reinforcing
  GSR general support-reinforcing TACON tactical control
  ATTACHED
  B-12. Attach is the placement of units or personnel in an organization where such placement is relatively
  temporary (JP 3-0). A unit may be temporarily placed into an organization for the purpose of conducting a
  specific operation of short duration. Attached units return to their parent headquarters (assigned or organic)
  when the reason for the attachment ends. The Army headquarters that receives another Army unit through
  assignment or attachment assumes responsibility for the ADCON requirements, and particularly sustainment,
  that normally extend down to that echelon, unless modified by directives.