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Internal security is the act of keeping peace within the borders of a sovereign state or other self-governing territories, generally by upholding the national law and defending against internal security threats. Responsibility for internal security may range from police to paramilitary forces, and in exceptional circumstances, the military itself.
Threats to the general peace may range from minor civil unrest, large scale violence, or even an armed insurgency. Threats to internal security may be directed at either the state's citizens, or the organs and infrastructure of the state itself, and may range from petty crime, serious organized crime, political or industrial unrest, or even domestic terrorism. Foreign powers may also act as a threat to internal security, by either committing or sponsoring terrorism or rebellion, without actually declaring war.
Governmental responsibility for internal security will generally rest with an interior ministry, as opposed to a defence ministry. Depending on the state, a state's internal security will be maintained by either the ordinary police or more militarised security forces (known as Gendarmerie or, literally, the Internal Troops.). Other specialized internal security agencies may exist to augment these main forces, such as border guards, special police units, or aspects of the state's intelligence agencies. In some states, internal security may be the primary responsibility of a secret police force.
The level of authorized force used by agencies and forces responsible for maintaining internal security might range from unarmed police to fully armed paramilitary organizations, or employ some level of less-lethal weaponry in between. For violent situations, internal security forces may contain some element of military type equipment such as non-military armored vehicles.
Depending on the organization of the state, internal security forces may have jurisdiction on national or federal levels. As the concept of internal security refers to the entity of the state and its citizens, persons who are threats to internal security may be designated as an enemy of the state or enemy of the people.
Persons detained by internal security forces may either be dealt with by the normal criminal justice system, or for more serious crimes against internal security such as treason, they may face special measures such as secret trials. In times of extreme unrest, internal security actions may include measures such as internment (detention without trial).
Depending on the nature of the specific state's form of government, enforcing internal security will generally not be carried out by a country's military forces, whose primary role is external defense, except in times of extreme unrest or other state of emergency, short of civil war. Often, military involvement in internal security is restricted to authorized military aid to the civil power as part of the principle of civilian control of the military. Military special forces units may in some cases be put under the temporary command of civilian powers, for special internal security situations such as counter terrorism operations.
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Counterterrorism, also known as anti-terrorism, relates to the practices, military tactics, techniques, and strategies that governments, law enforcement, businesses, and intelligence agencies use to combat or eliminate terrorism.
A paramilitary is an organization whose structure, tactics, training, subculture, and (often) function are similar to those of a professional military, but which is not part of a country's official or legitimate armed forces. Paramilitary units carry out duties that a country's military or police forces are unable or unwilling to handle. Other organizations may be considered paramilitaries by structure alone, despite being unarmed or lacking a combat role.
Special Branch is a label customarily used to identify units responsible for matters of national security and intelligence in British, Commonwealth, Irish, and other police forces. A Special Branch unit acquires and develops intelligence, usually of a political or sensitive nature, and conducts investigations to protect the State from perceived threats of subversion, particularly terrorism and other extremist political activity.
Military justice is the body of laws and procedures governing members of the armed forces. Many nation-states have separate and distinct bodies of law that govern the conduct of members of their armed forces. Some states use special judicial and other arrangements to enforce those laws, while others use civilian judicial systems. Legal issues unique to military justice include the preservation of good order and discipline, the legality of orders, and appropriate conduct for members of the military. Some states enable their military justice systems to deal with civil offenses committed by their armed forces in some circumstances.
Law enforcement in China consists of an extensive public security system and a variety of enforcement procedures used to maintain order in the country. Along with the courts and procuratorates, the country's judicial and public security agencies include the Ministry of Public Security (MPS) and the Ministry of State Security (MSS), with their descending hierarchy of departments, bureaus, subbureaus, and stations.
Military police (MP) are law enforcement agencies connected with, or part of, the military of a state. In wartime operations, the military police may support the main fighting force with force protection, convoy security, screening, rear reconnaissance, logistic traffic management, counterinsurgency, and detainee handling.
A gendarmerie is a military force with law enforcement duties among the civilian population. The term gendarme is derived from the medieval French expression gens d'armes, which translates to "men-at-arms", or "rural police". In France and some Francophone nations, the gendarmerie is a branch of the armed forces that is responsible for internal security in parts of the territory, with additional duties as military police for the armed forces. It was introduced to several other Western European countries during the Napoleonic conquests. In the mid-twentieth century, a number of former French mandates and colonial possessions adopted a gendarmerie after independence. A similar concept exists in Eastern Europe in the form of Internal Troops, which are present in many countries of the former Soviet Union and its former allied countries.
Law enforcement in India is imperative to keep justice and order in the nation. Indian law is enforced by a number of agencies. Unlike many federal nations, the constitution of India delegates the maintenance of law and order primarily to the states and territories.
Special police usually describes a police force or unit within a police force whose duties and responsibilities are significantly different from other forces in the same country or from other police in the same force, although there is no consistent international definition. A special constable, in most cases, is not a member of a special police force (SPF); in countries in the Commonwealth of Nations and often elsewhere, a special constable is a voluntary or part-time member of a national or local police force or a person involved in law enforcement who is not a police officer but has some of the powers of a police officer.
Law enforcement in Australia is one of the three major components of the country's justice system, along with courts and corrections. Law enforcement officers are employed by all three levels of government – federal, state/territory, and local.
Law enforcement in Japan is provided mainly by prefectural police under the oversight of the National Police Agency. The National Police Agency is administered by the National Public Safety Commission, ensuring that Japan's police are an apolitical body and free of direct central government executive control. They are checked by an independent judiciary and monitored by a free and active press.
A border guard of a country is a national security agency that performs border security. Some of the national border guard agencies also perform coast guard and rescue service duties.
Authority and management of civil law and order in Algeria is shared by the Sûreté Nationale, or Directorate General for National Security (DGSN), the civilian police force, under the Ministry of Interior, and the Gendarmerie Nationale under the Ministry of National Defence.
Law enforcement in Switzerland is mainly a responsibility of the 26 cantons of Switzerland, who each operate cantonal police agencies. Some cities also operate municipal police agencies as provided for by cantonal law.
The counter-terrorism page primarily deals with special police or military organizations that carry out arrest or direct combat with terrorists. This page deals with the other aspects of counter-terrorism:
In many countries, particularly those with a federal system of government, there may be several law enforcement agencies, police or police-like organizations, each serving different levels of government and enforcing different subsets of the applicable law.
Foreign internal defense (FID) is a term used by the military in several countries, including the United States, France, and the United Kingdom, to describe an integrated, or multi-country approach to combating actual or threatened insurgency in a foreign state. This foreign state is known as the Host Nation (HN) under the US doctrine. The term counter-insurgency is commonly used for FID.
The Department of the Army Civilian Police (DACP) are the civilian federal law enforcement bodies of the Department of the Army of the United States of America. There is no centralized DACP agency, with all civilian law enforcement agencies of the Army falling under the “DACP” title. The DACP are controlled jointly by the Department of the Army and the Department of Defense and as such, they are commonly referred to as DoD Police.
United States Army Counterintelligence (ACI) is the component of United States Army Military Intelligence which conducts counterintelligence activities to detect, identify, assess, counter, exploit and/or neutralize adversarial, foreign intelligence services, international terrorist organizations, and insider threats to the United States Army and U.S. Department of Defense (DoD).
