text: _________________________________________________________________________________Chapter 2
  Special-Purpose Forces Component
  2-57. The SPF component normally consists of assets from an SPF brigade.
  Personnel of such a brigade are specially trained for insertion in small SPF
  teams. These assets provide the OPFOR the ability to attack both regional
  and extraregional enemies throughout their tactical, operational, and strate-
  gic depth. SPF assets are inserted in advance of regional operations and in
  support of transition and adaptive operations. They are an essential part of
  the concept of using all means necessary and are critical to access-control
  operations. SPF assigned to the Army, Air Force, and Navy are designed for
  use at the operational level. The national-level SPF Command has its own
  SPF units.
  2-58. The SPF conduct operations to achieve strategic military, political, eco-
  nomic, and/or psychological objectives or achieve tactical or operational goals
  in support of strategic objectives. Such operations may have either long-
  range or immediate impact on the enemy. The OPFOR concept of SPF opera-
  tions includes reconnaissance, direct action, and diversionary measures. The
  SPF component of the IFC has a capability to support terrorist and irregular
  forces operations.
  2-59. If an OSC has received SPF units, it may further allocate some of these
  units to supplement the long-range reconnaissance assets a division or DTG
  has in its own IFC. However, the scarce SPF assets normally would remain
  at OSC level.
  Integrated Support Group
  2-60. The integrated support group (ISG) is a compilation of units perform-
  ing logistics tasks that support the IFC. Other combat support and combat
  service support units may be grouped in this component for organizational ef-
  ficiency although they may support only one of the major units of the IFC.
  The ISG is discussed in detail in Chapter 12. It can perform the same func-
  tions as the integrated support command (see below and in Chapter 12), but
  on a different scale and tailored to the support requirements of the IFC.
  INTEGRATED SUPPORT COMMAND
  2-61. The integrated support command (ISC) is the aggregate of combat ser-
  vice support units (and perhaps some combat support units) allocated from
  the administrative force structure to an OSC and not suballocated in a con-
  stituent or dedicated command relationship to a subordinate headquarters
  within the OSC. The OSC further allocates part of its combat service support
  units to its tactical-level subordinates and some, as an ISG, to support its
  IFC. The rest remain in the ISC at OSC level to provide overall support of
  the OSC. For organizational efficiency, other combat service support units
  may be grouped in this ISC, although they may support only one of the major
  units of the OSC. Sometimes, an ISC might also include units performing
  combat support tasks (such as chemical warfare, IW, or law enforcement)
  that support the OSC. (See Chapter 12 for more detail on the ISC.)