text: Tactical Control Measures
  Figure A-4. Single assembly area method
  A-14. A unit can also occupy a portion of a larger assembly area. This typically occurs when a subordinate
  formation occupies a portion of their higher headquarters assembly area. With this method, a unit has
  boundaries with adjacent units and may only have a portion of their assembly area focused on a perimeter.
  See figure A-5 for an example of an armor battalion occupying a portion of a larger assembly area.
  Figure A-5. Portion of a larger assembly area method
  A-15. A unit may also use a dispersed method to assign assembly areas. In this method subordinate units are
  assigned individual assembly areas. These subordinate units maintain their own 360-degree security. Similar
  to the single assembly area method, maneuver units occupy perimeter assembly areas with command and
  control, sustainment, and other units located within the interior. See figure A-6 on page A-6 for an example
  of the dispersed method by a division.