British Army troops were sent to Northern Ireland in 1969 in order to de-escalate tensions between the dominant Protestant and minority Catholic communities during the civil rights movement. Operation Banner, as it came to be known, then lasted until 2007, making it the longest continuous deployment in British military history. The army was initially welcomed by Catholic communities, who felt they would offer protection from what they viewed as a corrupt and sectarian police service, however this quickly changed after a series of interactions between the army and Catholic community turned violent. The army would then become the primary target of republican (predominantly Catholic) paramilitaries throughout the Troubles, and around 750 of those killed in the conflict were from the British Armed Forces (including the UDR).
The Ulster Defence Regiment
The Ulster Defence Regiment (UDR) was also established in 1970 in an attempt to relieve the police (the RUC) of any militaristic duties, and to replace the Ulster Special Constabulary (also known as the B Specials), who were not trusted by the wider Catholic community. During the Troubles, regular army forces were mostly made up of soldiers from mainland Britain, while the UDR drew from the local population - originally intended to represent local demographics in terms of religious representation, the UDR was almost entirely made up of Protestants within a few years.
Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007
Characteristic
British regiments
UDR/RIR
Total
2007 (Jul)
-
-
5,000
2005 (Jul)
-
-
10,083
2004
-
-
12,658
2003
-
-
13,311
2002
-
-
13,681
2001
-
-
13,000
2000 (Jun)
-
-
13,500
1999
11,150
4,350
-
1998
10,500
5,000
-
1994 (Jul)
-
5,241
-
1993*
-
5,412
-
1992
12,000
5,417
-
1991*
-
6,276
-
Created with Highcharts 7.2.2Total number of service personnelBritish regimentsUDR/RIRTotal1969 (Jun)1970197119721972 (Jul)197319741975197619771978197919801981198219831984198519861987198819891990*1991*19921993*1994 (Jul)199819992000 (Jun)20012002200320042005 (Jul)2007 (Jul)
010,00020,00030,00040,000
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University of Ulster. (July 25, 2023). Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007 [Graph]. In Statista. Retrieved May 14, 2025, from https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/
University of Ulster. "Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007." Chart. July 25, 2023. Statista. Accessed May 14, 2025. https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/
University of Ulster. (2023). Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007. Statista. Statista Inc.. Accessed: May 14, 2025. https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/
University of Ulster. "Total Number of Servicemembers of The British Army and Ulster Defence Regiment (Udr) Serving in Northern Ireland from 1969 to 2007." Statista, Statista Inc., 25 Jul 2023, https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/
University of Ulster, Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007 Statista, https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/ (last visited May 14, 2025)
Total number of servicemembers of the British Army and Ulster Defence Regiment (UDR) serving in Northern Ireland from 1969 to 2007 [Graph], University of Ulster, July 25, 2023. [Online]. Available: https://www.statista.com/statistics/1402108/ni-troubles-british-army-udr-numbers/
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