MI2, the British Military Intelligence Section 2, was a department of the British Directorate of Military Intelligence, part of the War Office. It was originally set up to handle geographic information. MI2a handled the Americas (excluding Canada), Spain, Portugal, Italy, Liberia, Tangier, and the Balkans. MI2b handled the Ottoman Empire, Trans-Caucasus, Arabia, Sinai, Abyssinia, North Africa excluding French and Spanish possessions, Egypt, and the Sudan.
After the First World War, its role was changed to handle Russian and Scandinavian intelligence. These functions were absorbed into MI3 in 1941.
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Espionage, spying, or intelligence gathering is the act of obtaining secret or confidential information (intelligence). A person who commits espionage is called an espionage agent or spy. Any individual or spy ring, in the service of a government, company, criminal organization, or independent operation, can commit espionage. The practice is clandestine, as it is by definition unwelcome. In some circumstances, it may be a legal tool of law enforcement and in others, it may be illegal and punishable by law.
The Double-Cross System or XX System was a World War II counter-espionage and deception operation of the British Security Service. Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves, and were then used by the British to broadcast mainly disinformation to their Nazi controllers. Its operations were overseen by the Twenty Committee under the chairmanship of John Cecil Masterman; the name of the committee comes from the number 20 in Roman numerals: "XX".
Juan Pujol García, also known as Joan Pujol i García, was a Spanish spy who acted as a double agent loyal to Great Britain against Nazi Germany during World War II, when he relocated to Britain to carry out fictitious spying activities for the Germans. He was given the codename Garbo by the British; their German counterparts codenamed him Alaric and referred to his non-existent spy network as "Arabal".
Wilhelm Franz Canaris was a German admiral and the chief of the Abwehr from 1935 to 1944. Canaris was initially a supporter of Adolf Hitler, and the Nazi regime. However, following the German invasion of Poland in 1939, Canaris turned against Hitler and committed acts of both passive and active resistance during the war.
The Security Service, also known as MI5, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ), and Defence Intelligence (DI). MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989. The service is directed to protect British parliamentary democracy and economic interests and to counter terrorism and espionage within the United Kingdom (UK).
Operation Mincemeat was a successful British deception operation of the Second World War to disguise the 1943 Allied invasion of Sicily. Two members of British intelligence obtained the body of Glyndwr Michael, a tramp who died from eating rat poison, dressed him as an officer of the Royal Marines and placed personal items on him identifying him as the fictitious Captain William Martin. Correspondence between two British generals that suggested that the Allies planned to invade Greece and Sardinia, with Sicily as merely the target of a feint, was also placed on the body.
A security agency is a governmental organization that conducts intelligence activities for the internal security of a nation. They are the domestic cousins of foreign intelligence agencies, and typically conduct counterintelligence to thwart other countries' foreign intelligence efforts.
E-boat was the Western Allies' designation for the fast attack craft of the Kriegsmarine during World War II; E-boat could refer to a patrol craft from an armed motorboat to a large Torpedoboot. The name of E-boats was a British designation using the letter E for Enemy,
The Intelligence Corps is a corps of the British Army. It is responsible for gathering, analysing and disseminating military intelligence and also for counter-intelligence and security. The Director of the Intelligence Corps is a brigadier.
A military staff or general staff is a group of officers, enlisted and civilian staff who serve the commander of a division or other large military unit in their command and control role through planning, analysis, and information gathering, as well as by relaying, coordinating, and supervising the execution of their plans and orders, especially in case of multiple simultaneous and rapidly changing complex operations. They are organised into functional groups such as administration, logistics, operations, intelligence, training, etc. They provide multi-directional flow of information between a commanding officer, subordinate military units and other stakeholders. A centralised general staff results in tighter top-down control but requires larger staff at headquarters (HQ) and reduces accuracy of orientation of field operations, whereas a decentralised general staff results in enhanced situational focus, personal initiative, speed of localised action, OODA loop, and improved accuracy of orientation.
MI4 was a department of the British Directorate of Military Intelligence, Section 4, part of the War Office. It was responsible for aerial reconnaissance and interpretation. It developed into the JARIC intelligence agency. The present day successor agency to MI4 is the Defence Intelligence Fusion Centre.
MI3, the British Military Intelligence Section 3, was a division of the British Directorate of Military Intelligence, part of the War Office. It was originally set up to handle geographical information. Its subsections in 1914 included:
MI14, or British Military Intelligence, Section 14 was a department of the British Directorate of Military Intelligence. It was an intelligence agency of the War Office, which specialised in intelligence about Germany. Originally part of MI3, during the Second World War the German sub-department's expertise and analysis became so important to the war effort that it was spun off into its own Military Intelligence section.
MI11, or Military Intelligence, Section 11, was a department of the British Directorate of Military Intelligence, part of the War Office.
MI15, the British Military Intelligence Section 15, was a department of the British Directorate of Military Intelligence, part of the War Office. It was set up in 1942 to handle aerial photography. In 1943 this function was transferred to the air ministry and MI15 became responsible for the coordination of intelligence about enemy anti-aircraft facilities.
The Abwehr was the German military-intelligence service for the Reichswehr and the Wehrmacht from 1920 to 1945. Although the 1919 Treaty of Versailles prohibited the Weimar Republic from establishing an intelligence organization of their own, they formed an espionage group in 1920 within the Ministry of Defence, calling it the Abwehr. The initial purpose of the Abwehr was defence against foreign espionage: an organizational role which later evolved considerably. Under General Kurt von Schleicher the individual military services' intelligence units were combined and, in 1929, centralized under Schleicher's Ministeramt within the Ministry of Defence, forming the foundation for the more commonly understood manifestation of the Abwehr.
The 302nd Military Intelligence Battalion, whose unit crest portrays the "sly fox", evolved from the 3252d Signal Service Company which was activated in England on 1 April 1944.
The 500th Military Intelligence Brigade is a unit of the United States Army and subordinate to the U.S. Army Intelligence and Security Command. Its mission is to provide tailored, multi-disciplined intelligence and intelligence capabilities in support of USARPAC and other Commands, to defeat adversaries, promote regional stability, support partners and allies, and protect US interests. The 500th is headquartered at Schofield Barracks, Hawaii.
Nathalie "Lily" Sergueiew was a double agent who worked for MI5 during World War II under the codename "Treasure". She played a significant role in the Double-Cross System, particularly by deceiving the Germans about the location of the D-Day landings.
The Secret Intelligence Service (SIS), commonly known as MI6, is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of human intelligence in support of the UK's national security. SIS is one of the British intelligence agencies and the Chief of the Secret Intelligence Service ("C") is directly accountable to the Foreign Secretary.
