
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". It was the largest infantry regiment in the British Army, formed with seven battalions plus another four added within two years.

The Northern Ireland War Memorial also called NI War Memorial and War Memorial was opened in 2007 in Talbot Street, Belfast, Northern Ireland. It replaced an earlier building called Memorial House which was located in Waring Street on a site which was bombed during the Blitz in 1941. It contains the Home Front Exhibition and the first national memorial to the hundreds killed in the Belfast blitz.

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).

Royal Air Force Greencastle or more simply RAF Greencastle is a former Royal Air Force airfield located 2 miles (3.2 km) south of the fishing village of Kilkeel and took in a large part of Cranfield Bay.

Thiepval Barracks in Lisburn, County Antrim, is the headquarters of the British Army in Northern Ireland and its 38th (Irish) Brigade.

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". It was the largest infantry regiment in the British Army, formed with seven battalions plus another four added within two years.

The Ulster Special Constabulary was a quasi-military reserve special constable police force in Northern Ireland. It was set up in October 1920, shortly before the partition of Ireland. It was an armed corps, organised partially on military lines and called out in times of emergency, such as war or insurgency. It performed this role in 1920–22 during the Irish War of Independence and in the 1950s, during the IRA Border Campaign.