text: Chapter 1
  1-200. Maintaining an awareness of the common operational picture (COP) as an operation progresses is
  another key risk reduction technique. To aid leaders and Soldiers in this process, units develop and employ
  effective techniques and standard operating procedures, including—
  * Monitoring the next higher echelon’s radio network.
  * Having communication between units.
  * Providing COP updates.
  * Including accurate position reporting.
  * Training and using liaison officers.
  * Overseeing local security.
  For more information on risk management see ATP 5-19.
  Antiterrorism
  1-201. Antiterrorism consists of defensive measures used to reduce the vulnerability of individuals and
  property to terrorist acts, including limited response and containment by local military and civilian forces (JP
  3-26). Antiterrorism is always a consideration for all forces. (See ATP 3-37.2 for additional information on
  antiterrorism operations).
  Police Operations
  1-202. Police operations encompass two tasks—law enforcement and policing. These two tasks are
  complementary and interdependent but are conducted with a different intent. Law enforcement is conducted
  for the purpose of enforcing laws, investigating crimes, and apprehending (when warranted) persons for
  adjudication within the appropriate judicial system. Policing is the application of control measures within an
  area of operation to maintain law and order, safety, and other matters affecting the general welfare of the
  population (FM 3-39). Policing focuses on maintaining order and establishing security—not the enforcement
  of laws on the population or to compelling compliance at the risk of legal penalties. The relative emphasis
  given to policing and law enforcement tasks is based on the operational and mission variables, including the
  presence of the applicable rule of law. An operational environment characterized by general war will require
  police operations heavily weighted toward policing tasks, with minimal emphasis on law enforcement.
  Operational environments characterized by relative stability and governance under the rule of law will require
  much more law enforcement activity and less focus on policing tasks. (See ATP 3-39.10 for additional
  information on police operations).
  Area Security
  1-203. Area security is a type of security operation conducted to protect friendly forces, lines of
  communications, and activities within a specific area. Area security operations occur regardless of which
  operation is currently dominant. Area security is conducted through the following five variations—
  * Site security. A unit conducting site security may protect locations such as base/base camps,
  tactical assembly areas, critical assets, port areas and piers.
  * Line of communication and route security
  * Convoy security.
  * Response force operations. Types of response forces include a mobile security force, such as a
  military police unit, and a tactical combat force, such as a combined arms battalion.
  * Area damage control.
  1-204. Operations in noncontiguous assigned areas require units to emphasize area security. During
  offensive and retrograde operations, the speed at which the main body moves provides some measure of
  security. Rapidly moving units in open terrain will deploy a forward security force to provide advance
  warning of enemy forces. Technical assets can be used when no security force is assigned. In restrictive
  terrain, security forces focus on key terrain such as potential choke points.
  1-205. Commanders execute echelon support area and base security as part of an echelon’s sustaining
  operations responsibilities. Area security is normally an economy of force measure ensuring the continued
  conduct of sustaining operations to support the echelon’s main and supporting efforts. All area security