The battalion was formed in 1972 after an announcement by Major General Robert Ford, Commander Land Forces in Northern Ireland (CLFNI). The raising of the new and final battalion of the UDR brought operational strength up to 9,000 men, making the regiment not only the youngest, but largest infantry battalion in the British Army.
The new battalion was commanded by Lieutenant Colonel Robin Chappell, who had previously been commander of the neighbouring 2 UDR. He was the first regular officer to command the 2nd battalion, and the only regular officer ever to command two separate UDR battalions.
In 1990 11 UDR was reported as having 772 members who patrolled an area of 1,500 square kilometres.
See: Ulster Defence Regiment Uniform, armament & equipment
From formation battalion HQ was based at Mahon Road Barracks, known by the troops as "Fort Mahon", a new purpose built UDR base on the Mahon Road, Portadown beside the historic Mahon House. Assuming command and expanding platoons and companies once part of the Armagh based 2 UDR in Lurgan, Portadown and Tandragee and also the Banbridge Company of 3 UDR.
Mahon Barracks, Portadown. - a mixture of regular army and permanent cadre/part-time administration staff, instructors, watchkeepers, mechanics and a guard force of Conrate soldiers. The commander was the battalion commander who was a regular Lieutenant Colonel. Other regular soldiers on attachment included the adjutant (a major), a Training Major and permanent staff instructors. The Quartermaster's stores were also part of this company as were the core services of the battalion which, although modified slightly on expansion, generally consisted of operational organisation, vehicles, radio services, catering and pay.
Scarva Road Barracks, Banbridge - an experimental permanent cadre platoon formed after Ulsterisation which carried out the same duties as the regular army. Selected from the youngest and fittest soldiers with Commanders and NCO's who had, where possible, previous military experience. The commander was a Scottish WO2 who had 22 years experience with the Royal Highland Fusiliers, fighting in colonial conflicts during the disestablishment of empire. His second in command was a Colour Sergeant who had fought in the Congo Crisis and in Cyprus. Main duties were to quickly seal off the A1 Belfast - Dublin dual carriageway and to act as Quick Reaction Force (QRF) for 3 Infantry Brigade and RUC J Division. As the number of permanent cadre soldiers grew a new full-time company was formed at Portadown and the Operations Platoon was integrated into it taking the designation A Company.
Based at Mahon Barracks - a part-time company. Later renamed B Company. Drawn from men (and later women) from the village of Tandragee and surrounding area this company came on duty at 7pm on weekdays and all day on weekends. In addition to patrolling their own villages and rural areas they were also responsible for the relief of the regular army on the permanent guard post at Tandragee Power Station.
(Dromore) was never formed but the designation was later given to A (Tandragee) Coy when the full-time rifle company was established at Portadown from the Operations Platoon and designated "A Company".
Kitchen Hill Barracks, Lurgan. - a part-time company with a small permanent cadre staff who ran the UDR centre within the regular army's barracks. This company was responsible for patrolling the town of Lurgan and its surrounding villages and rural areas.
Subsequent to a raid against C Company, on 20 October 1972, the guard commander Sgt Billy Hanna MM was convicted of supplying information to loyalist paramilitaries. Most were recovered in follow up operations but some were later proven to have been used by loyalist organisations to carry out crime, including murders.
Scarva Road Barracks, Banbridge - a part-time company with a small permanent cadre staff who administered and guarded the barracks. Drawing its recruits from Banbridge, Dromore and surrounding rural villages and areas the company also patrolled these areas and provided extra checkpoints on the A1 dual carriageway.
A part-time company with a small nucleus of permanent cadre administrative staff drawn from the market town of Portadown and its surrounding villages and rural areas. The company provided patrols in the town and surrounding areas as well as the night guard on the telephone exchange at Edenderry.
After the amalgamation of 1 and 9 UDR in 1984 - a part-time company with a small nucleus of permanent cadre administration staff who ran the company offices and facilities within Thiepval Barracks. Recruiting from Lisburn and surrounding areas it too had a mixed patrol area of towns and villages but by its location also patrolled areas of south Belfast.
RUC J Division - taking in the sub-divisions of:MAHON ROAD: Divisional Command and barracks in Portadown Subdivision.
PORTADOWN: Subdivisional Command.
LURGAN: Subdivisional Command.
MOIRA: Barracks in Lurgan Subdivision.
CRAIGAVON: Barracks in Lurgan Subdivision.
BANBRIDGE: Subdivisional Command.
DROMORE: Barracks in Banbridge Subdivision.
DROMARA: Barracks in Banbridge Subdivision.
GILFORD: Barracks in Banbndge Subdivision.
RATHFRILAND: Barracks in Banbridge Subdivision. (3 UDR were responsible for Rathfriland town)
Both part-time and full-time companies of 11 UDR took over operational responsibility in other areas to relieve the pressure on border battalions who had taken heavy casualties, particularly 2 UDR. Part-time soldiers deployed for a weekend but the full-time Operations Platoon (later A Company) and elements of HQ Company Conrate Guard deployed for up to two weeks at a time. Some of these detachments were at:Bessbrook
As well as manning permanent vehicle checkpoints (PVCPs) at these location the 11 UDR Platoons also engaged in urban and rural patrol work with the full-time soldiers taking part in searches, observation activities and denial of territory to the enemy.
The battalion lost nine men during its existence. A further eight were killed as a result of their membership after they had left the battalion. No figures are available for those wounded.
Two soldiers from the 11 UDR's C Company, (also UVF members), were convicted of the 1975 killing of three musicians from the Irish showband, the Miami. This attack was led by Robin Jackson, a former ii UDR soldier who had been discharged for "undisclosed reasons". Two soldiers from 11 UDR's E Company, Portadown(also UVF members), died in the premature explosion of their own bomb. More detailed information can be read at: Miami Showband killings.Robert Smith, Democratic Unionist Party politician, former Lord Mayor of Craigavon
See also:Category:Ulster Defence Regiment soldiers
Category:Ulster Defence Regiment officers