The Joint Support Group (JSG) is a covert military intelligence unit of the British Army Intelligence Corps.
 It was established in 2007 as Operation Banner concluded and following the Stevens Inquiry into allegations of collusion between the former Force Research Unit and Protestant paramilitary groups.
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.
Donald Nichols (18 February 1923 – 2 June 1992) was a United States Air Force officer who worked in military intelligence.
 He founded and commanded the U.S. Air Force's first active military intelligence unit, the 6004th Air Intelligence Service Squadron (6004th AISS), which he founded in 1950 during the Korean War.
 Although he began his military career in the motor pool, he eventually sparked the infiltration of espionage teams behind communist lines, as well as personally gathering the first data on the communist MiG-15 fighter.
 A trusted and reliable intelligence officer who had predicted the start date of the Korean War, he enjoyed 24-hour access to South Korean President Syngman Rhee and his own commanding officer, U.S. Air Force General Earle Partridge.
 Under his leadership, the 6004th AISS served as the principal source of intelligence for Far East Air Force during the fighting.
M Special Unit, was a joint Allied special reconnaissance unit, part of the Services Reconnaissance Department, in the South West Pacific theatre of World War II.
 A joint Australian, New Zealand, Dutch and British military intelligence unit, it saw action in New Guinea and the Solomon Islands between 1943–1945, against the Empire of Japan.
The Directorate General of Forces Intelligence (Bengali: ডিরেক্টরেট জেনারেল অফ ফোর্সেস ইন্টেলিজেন্স , abbreviated "DGFI Bengali: ডিজিএফআই )," is the foreign military intelligence section of the Bangladesh Armed Forces.
 DGFI is operationally responsible for providing national security and intelligence information to the Bangladesh government and armed forces.
 Although DGFI was formed as a military intelligence unit, over time it has established itself as the principal intelligence unit in Bangladesh alongside the National Security Intelligence (NSI).
The Force Research Unit (FRU) is a covert military intelligence unit of the British Army part of the Intelligence Corps.
 It was established in 1982 during the Troubles to obtain intelligence from secretly penetrating terrorist organisations in Northern Ireland by recruiting and running agents and informants.
Military Intelligence Battalion (MIB) (Croatian: "Vojno-obavještajna bojna, VOb" , part of Croatian Army, is intelligence unit which serves as support to all other units of Republic of Croatia Armed Forces.
 It was established in 2000 during restructuring of Armed Forces when 350th Sabotage Detachment of General Staff, 1st Reconnaissance and Sabotage company of GS "Anguilla", 74th Engineer Company of GS, 280th UAV Platoon of GS as well as 1st Croatian Guards, and acted as 350th Military Intelligence Battalion until 2007.
Operation Banner was the operational name for the British Armed Forces' operation in Northern Ireland from August 1969 to July 2007, as part of the Troubles.
 It was the longest continuous deployment in the British military's history.
 The British Army was initially deployed, at the request of the unionist government of Northern Ireland, in response to the August 1969 riots.
 Its role was to support the Royal Ulster Constabulary (RUC) and to assert the authority of the British government in Northern Ireland.
 At the peak of the operation in the 1970s, about 21,000 British troops were deployed, most of them from Britain.
 As part of the operation, a new locally-recruited regiment was also formed: the Ulster Defence Regiment (UDR).
The Finnish Military Intelligence Service (Finnish: "Pääesikunnan tiedusteluosasto" , literally "The General Staff's Intelligence Unit") is responsible for the military intelligence in Finland, and accountable to the Minister of Defence.
 Its SIGINT unit, the Finnish Intelligence Research Establishment is located in Tikkakoski.
The Military Intelligence Division was the military intelligence branch of the United States Army and United States Department of War from May 1917 (as the Military Intelligence Section, then Military Intelligence Branch in February 1918, then Military Intelligence Division in June 1918) to March 1942.
 It was preceded by the Military Information Division and the General Staff Second Division and in 1942 was reorganised as the Military Intelligence Service.

Question: What British covert military intelligence unit was founded after the longest continuous deployment in the British military's history?
Answer: The Joint Support Group