ISTAR stands for intelligence, surveillance, target acquisition, and reconnaissance. In its macroscopic sense, ISTAR is a practice that links several battlefield functions together to assist a combat force in employing its sensors and managing the information they gather.
A long-range reconnaissance patrol, or LRRP, is a small, well-armed reconnaissance team that patrols deep in enemy-held territory.
The 21 Special Air Service Regiment (Artists) (Reserve), historically known as The Artists Rifles is a regiment of the Army Reserve. Its name is abbreviated to 21 SAS(R).
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.
16 Air Assault Brigade Combat Team, known simply as 16 Air Assault Brigade from 1999 – 2021, is a formation of the British Army predominantly based in Colchester, Essex. It makes up the Air Assault Task Force, a battlegroup held at high readiness, and is the only brigade in the British Army focused on operating via parachute, helicopter and air-landing.
The Bulgarian Land Forces are the ground warfare branch of the Bulgarian Armed Forces. It is administered by the Ministry of Defence, previously known as the Ministry of War during the Kingdom of Bulgaria. The Land Forces were established in 1878, when they were composed of anti-Ottoman militia (opalchentsi) and were the only branch of the Bulgarian military.
Director Special Forces (DSF) is the senior British Armed Forces officer responsible for Special Forces. The post is a senior role within the Ministry of Defence (MoD). As Director, the incumbent is responsible for the provision of United Kingdom Special Forces (UKSF) capability to MoD, and holds Operational Command for discrete Special Forces operations.
United Kingdom Special Forces (UKSF) is a directorate comprising the Special Air Service, the Special Boat Service, the Special Reconnaissance Regiment, the Special Forces Support Group, 18 (UKSF) Signal Regiment and the Joint Special Forces Aviation Wing, as well as the supporting No. 47 Squadron. In British freedom of information law, "special forces" has been defined as "those units of the armed forces of the Crown and the maintenance of whose capabilities is the responsibility of the Director of Special Forces or which are for the time being subject to the operational command of that Director". The Royal Marine Commandos and the Ranger Regiment are special operations–capable forces, but they do not form part of UKSF.
In September 1939, the British Army was in process of expanding their anti-aircraft and mobile assets. Among these new changes was the formation of Anti-Aircraft Command which was formed on 1 April 1939, and the 1st Armoured Division formed in 1937. The list below will include the British Army units, colonial units, and those units which were in the process of formation.
The 4th Military Intelligence Battalion is a military intelligence unit of the British Army's Intelligence Corps, which provides close intelligence support to the headquarters for the only warfighting division in the army.
The 1st Artillery Brigade was a support formation of the British Army from 1961-77 and from 1997. Part of the 3rd Division, it oversaw all army close support artillery and deep fires units. Under the Future Soldier programme, the brigade merged with 1st Armoured Infantry Brigade to form 1st Deep Reconnaissance Strike Brigade Combat Team.
2nd Medical Brigade is a formation of the British Army formed under 1st UK Division. It predominantly provides deployed hospital care via 13 Field Hospitals. It also provides specialist medical capabilities via three Nationally Recruited Units; 306 Hospital Support Regiment, 335 Medical Evacuation Regiment and Medical Operational Support Group.
8th Engineer Brigade is an engineering support formation of the British Army, which forms part of 1st Division.
23 Special Air Service Regiment (Reserve) (23 SAS(R)) is a British Army Reserve special forces unit that forms part of United Kingdom Special Forces. Together with 21 Special Air Service Regiment (Artists) (Reserve) (21 SAS(R)), it forms the Special Air Service (Reserve) (SAS(R)). Unlike the regular SAS Regiment, it accepts members of the general population without prior military service.
The page contains the current structure of the British Army. The British Army is currently being reorganised to the Future Soldier structure.
The following is a hierarchical outline for the structure of the British Army in 1989. The most authoritative source for this type of information available is Ministry of Defence, Master Order of Battle, and United Kingdom Land Forces, HQ UKLF, UKLF ORBAT Review Action Plan, HQ UKLF, 1990.
This article lists the structure of the Royal Danish Army in 1989 and in May 2020:
1st Military Intelligence Brigade was a formation of the British Army formed after the Future Army Structure review reform, but in 2014 was absorbed into the new 1st Intelligence, Surveillance and Reconnaissance Brigade.
Future Soldier is a reform of the British Army resulting from the Integrated Review of Security, Defence, Development and Foreign Policy published in March 2021. The aim of the reform is to create a more lethal, agile and expeditionary force, able to fight and win wars and to operate in the grey-zone between peace and war. Future Soldier was published on 25 November 2021 and deals with the organizational changes of the British Army, with changes to personnel and equipment were set out in the Defence in a Competitive Age paper published on 22 March 2021.
Field Army Troops is a command of the British Army under direct control of Headquarters, Field Army, and consisting of the Surveillance Group, the Understand Group, the Cyber Electro Magnetic Activities Effects Group and the 2nd Medical Group.
United Kingdom 
British Army 