The Ulster Defence Regiment (UDR) was an infantry regiment of the British Army established in 1970, with a comparatively short existence ending in 1992. Raised through public appeal, newspaper and television advertisements, their official role was the "defence of life or property in Northern Ireland against armed attack or sabotage" but unlike troops from Great Britain they were never used for "crowd control or riot duties in cities". At the time the UDR was the largest infantry regiment in the British Army, formed with seven battalions plus another four added within two years.
From 1969 until 1997, the Provisional Irish Republican Army (IRA) conducted an armed paramilitary campaign primarily in Northern Ireland and England, aimed at ending British rule in Northern Ireland in order to create a united Ireland.
Operation Banner was the operational name for the British Armed Forces' operation in Northern Ireland from 1969 to 2007, as part of the Troubles. It was the longest continuous deployment in British military 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. This involved counter-insurgency and supporting the police in carrying out internal security duties such as guarding key points, mounting checkpoints and patrols, carrying out raids and searches, riot control and bomb disposal. More than 300,000 soldiers served in Operation Banner. At the peak of the operation in the 1970s, about 21,000 British troops were deployed, most of them from Great Britain. As part of the operation, a new locally-recruited regiment was also formed: the Ulster Defence Regiment (UDR).
Brendan Hughes, also known as "The Dark", and "Darkie" was a leading Irish republican and former Officer Commanding (OC) of the Belfast Brigade of the Provisional Irish Republican Army (IRA). He was the leader of the 1980 Irish hunger strike.
The Glenanne barracks bombing was a large truck bomb attack carried out by the Provisional IRA against a British Army base at Glenanne, near Mountnorris, County Armagh. The driverless lorry was rolled down a hill at the rear of the barracks and crashed through the perimeter fence. The bombing took place on 31 May 1991 and left three soldiers killed and 14 people wounded, four of them civilians.
1st Battalion, Ulster Defence Regiment was formed in 1970 as part of the 7 original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was amalgamated with the 9th Battalion, Ulster Defence Regiment in 1984 to form the 1st/9th Battalion, Ulster Defence Regiment.
2nd Battalion, Ulster Defence Regiment was formed in 1970 as part of the seven original battalions specified in the Ulster Defence Regiment Act 1969, which received royal assent on 18 December 1969 and was brought into force on 1 January 1970. It was, along with the rest of the regiment, amalgamated with the Royal Irish Rangers in 1992 to form the Royal Irish Regiment. It had previously been amalgamated in 1991 with the 11th Battalion Ulster Defence Regiment to form the 2nd/11th Battalion Ulster Defence Regiment.
The 11th (Craigavon) Battalion, Ulster Defence Regiment was formed from companies of the 2nd Battalion Ulster Defence Regiment and the 3rd Battalion Ulster Defence Regiment in 1972. In 1991 under the reductions planned in Options for Change by the British Army, it again amalgamated with 2 UDR to form the 2nd/11th Battalion Ulster Defence Regiment.
The 9th Battalion, Ulster Defence Regiment was formed in 1972 from two companies of the 1st Battalion Ulster Defence Regiment creating a second battalion in County Antrim. It was amalgamated with 1 UDR in 1984 to form 1/9 UDR.
4th Battalion, Ulster Defence Regiment was formed in 1970 as part of the seven original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was amalgamated with the 6th Battalion, Ulster Defence Regiment in 1992 to form the 4th/6th Battalion, Ulster Defence Regiment.
5th Battalion, Ulster Defence Regiment was formed in 1970 as part of the seven original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was, along with the rest of the regiment, amalgamated with the Royal Irish Rangers in 1992 to form the Royal Irish Regiment.
The 6th Battalion, Ulster Defence Regiment was formed in 1970 as part of the seven original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was, along with the rest of the regiment, amalgamated with the Royal Irish Rangers in 1992 to form the Royal Irish Regiment.
7th Battalion, Ulster Defence Regiment was formed in 1970 as part of the 7 original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969 and was brought into force on 1 January 1970. It was amalgamated with the 10th Battalion, Ulster Defence Regiment in 1984 to form the 7th/10th Battalion, Ulster Defence Regiment.
The 7th/10th Battalion, Ulster Defence Regiment was formed in 1984 as a result of an amalgamation between the 7th Battalion Ulster Defence Regiment and the 10th Battalion Ulster Defence Regiment. The resultant 7/10 UDR was subsumed into the Royal Irish Rangers in 1992 as part of the amalgamation which formed the Royal Irish Regiment.
Colin Duffy is an Irish republican, described by the BBC as the most recognisable name and face among dissident republicans in Northern Ireland. He was cleared of murder charges in three court cases involving police and army killings.
William Henry Wilson Hanna MM was a high-ranking Ulster loyalist who founded and led the Mid-Ulster Brigade of the Ulster Volunteer Force (UVF) until he was killed, allegedly by Robin Jackson, who took over command of the brigade.
The Coagh ambush was a military confrontation that took place in County Tyrone, Northern Ireland, on 3 June 1991, during The Troubles, when a Provisional Irish Republican Army (IRA) active service unit from its East Tyrone Brigade was ambushed by the British Army's Special Air Service (SAS) at the village of Coagh, in County Tyrone, whilst on its way to kill a part-time member of the Ulster Defence Regiment (UDR). The ambush resulted in the deaths of all three IRA men involved.
On 15 June 1988 an unmarked military van carrying six British Army soldiers was blown up by the Provisional Irish Republican Army (IRA) at Market Place in Lisburn, Northern Ireland. The explosion took place at the end of a charity marathon run in which the soldiers had participated. All six soldiers were killed in the attack – four outright, one on his way to hospital and another later on in hospital.
On 2 May 1974 the Provisional Irish Republican Army (IRA) attacked a British Army base manned by the Ulster Defence Regiment (UDR) near the Northern Ireland–Republic of Ireland border at Clogher, County Tyrone. The IRA unit engaged the small base with automatic weapons, rockets and improvised mortars. Ferret armoured cars were deployed to the scene and a fierce firefight erupted. The IRA withdrew behind the border with the Republic. The assault on the outpost killed greenfinch Eva Martin and wounded another UDR soldier.
United Kingdom 
British Army 