#battle_group  an army unit usually consisting of five companies
  supertype:  #army_unit  a military unit that is part of an army
  member:  #company.army_unit
  member of:  #division.army_unit  an army unit large enough to sustain combat; "two infantry divisions were held in reserve"
     member of:  #corps__corp  an army unit usually consisting of two or more divisions
        member of:  #regular_army__regulararmy__army  an organization of military land forces

No statement uses or specializes #battle_group; click here to add one.