text: Chapter 5
  expected longevity of the relationship between the headquarters involved and quickly identifies the degree
  of support that the gaining and losing Army commanders provide.
  Table 5-2 depicts the Army support relationships. Army support relationships are not a command
  authority and are more specific than joint support relationships. Commanders establish support relationships
  when subordination of one unit to another is inappropriate.
  Table 5-1. Army command relationships
  Then inherent responsibilities—
  Have May be Unless Are Provide Establish/ Have Can impose
  command task- modified, assigned liaison maintain priorities on gained
  If
  relationship organized ADCON position to— communi- established unit further
  relationship
  with— by1— responsibility or AO cations by— command
  is—
  goes by— with— or support
  through— relationship
  of—
  All organic Organic Army HQ Organic NA NA Organic HQ Attached;
  forces HQ specified in HQ OPCON;
  Organic organized organizing TACON; GS;
  with the HQ document GSR; R; DS
  Gaining unit Gaining Gaining Army OPCON As As required ASCC or As required
  HQ HQ chain of required by OPCON Service- by OPCON
  Assigned
  command by assigned HQ HQ
  OPCON
  Gaining unit Gaining Gaining Army Gaining As Unit to Gaining unit Attached;
  unit HQ unit required which OPCON;
  Attached by gaining attached TACON; GS;
  unit GSR; R; DS
  Gaining unit Parent Parent unit Gaining As As required Gaining unit OPCON;
  unit and unit required by gaining TACON; GS;
  gaining by gaining unit and GSR; R; DS
  unit; unit parent unit
  gaining
  OPCON2
  unit may
  pass
  OPCON
  to lower
  HQ1
  Gaining unit Parent Parent unit Gaining As As required Gaining unit TACON;GS
  unit unit required by gaining GSR; R; DS
  by gaining unit and
  TACON
  unit parent unit
  1 In NATO, the gaining unit may not task-organize a multinational force. (See TACON.)
  2 Other relationships attributional to ADCON and OPCON are described in ADP 3-0.
  Legend:
  ADCON administrative control HQ headquarters
  AO area of operations NA not applicable
  ASCC Army Service component NATO North Atlantic Treaty
  command Organization
  DS direct support OPCON operational control
  GS general support R reinforcing
  GSR general support– TACON tactical control
  reinforcing