Question: Which country's longest continuous deployment began because of intense political and sectarian rioting in Northern Ireland?

full_context: Document 1: The Troubles in Limavady: Four people were killed in violence relating to the Northern Ireland Troubles in the town of Limavady, County Londonderry. All were Protestants, and all were killed by the Provisional Irish Republican Army (PIRA, better known as the IRA). One was a prison officer and one was a Royal Ulster Constabulary (RUC) officer. The other two victims were civilians killed by a van bomb explosion outside the Limavady RUC base on 28 March 1972. They were driving past at the time of the attack.
Document 2: Operation Banner: Operation Banner was the operational name for the British Armed Forces' operation in Northern Ireland from August 1969 to July 2007, as part of the Troubles. It was the longest continuous deployment in the British military's 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. At the peak of the operation in the 1970s, about 21,000 British troops were deployed, most of them from Britain. As part of the operation, a new locally-recruited regiment was also formed: the Ulster Defence Regiment (UDR).
Document 3: 1969 Northern Ireland riots: During 12–17 August 1969, intense political and sectarian rioting took place in Northern Ireland. There had been sporadic violence throughout the year arising from the civil rights campaign, which was demanding an end to discrimination against Irish Catholics. Civil rights marches were repeatedly attacked by both Ulster Protestant loyalists and by the Royal Ulster Constabulary (RUC), a unionist and largely Protestant police force.
Document 4: Dissident Irish Republican campaign: Since the Provisional Irish Republican Army (IRA) called a ceasefire and ended its armed campaign in 1997, breakaway groups opposed to the ceasefire ("dissident Irish republicans") have continued a low-level armed campaign against the British security forces in Northern Ireland. The main paramilitaries involved are the Real IRA, Continuity IRA and Óglaigh na hÉireann. They have targeted the British Army and Police Service of Northern Ireland (PSNI, successor of the Royal Ulster Constabulary) in gun and bomb attacks, as well as with mortars and rockets. They have also carried out bombings that are meant to cause disruption. However, their campaign has not been as intensive as the Provisional IRA's.
Document 5: Royal Irish Regiment (1992): The Royal Irish Regiment (27th (Inniskilling) 83rd and 87th and Ulster Defence Regiment) (R IRISH) is an infantry regiment of the British Army. The regiment was founded in 1992 through the amalgamation of the Royal Irish Rangers and the Ulster Defence Regiment. Their oldest predecessor; the 27th Regiment of Foot; was first raised in June 1689 to fight in the Williamite War in Ireland. Other notable regiments in their lineage include the Royal Inniskilling Fusiliers, Royal Irish Rifles and the Royal Irish Fusiliers (Princess Victoria's).
Document 6: Ulster Defence Association: The Ulster Defence Association (abbreviated UDA) is the largest Ulster loyalist paramilitary and vigilante group in Northern Ireland. It was formed in September 1971 and undertook a campaign of almost twenty-four years during the Troubles. For most of this time it was a legal organisation. Its declared goal was to defend Ulster Protestant loyalist areas and to combat Irish republicanism, particularly the Provisional Irish Republican Army (IRA). In the 1970s, uniformed UDA members openly patrolled these areas armed with batons and held large marches and rallies. Within the UDA was a group tasked with launching paramilitary attacks; it used the covername Ulster Freedom Fighters (UFF) so that the UDA would not be outlawed. The British government outlawed the "UFF" in November 1973, but the UDA itself was not proscribed as a terrorist group until August 1992.
Document 7: Northern Ireland Civil Rights Association: The Northern Ireland Civil Rights Association was an organisation which campaigned for civil rights for the Catholic minority in Northern Ireland during the late 1960s and early 1970s. Formed in Belfast on 9 April 1967, the civil rights campaign attempted to achieve reform by publicising, documenting, and lobbying for an end to discrimination in areas such as elections (which were subject to gerrymandering and property requirements), discrimination in employment, in public housing and alleged abuses of the Special Powers Act. The genesis of the organisation lay in a meeting in Maghera in August 1966 between the Wolfe Tone Societies which was attended by Cathal Goulding, then chief of staff of the IRA.
Document 8: Bloody Sunday (1921): Bloody Sunday or Belfast's Bloody Sunday was a day of violence in Belfast, Ireland (present-day Northern Ireland) on 10 July 1921, during the Irish War of Independence. In retaliation for an Irish Republican Army (IRA) ambush of a police raiding party, Protestant loyalists attacked Catholic enclaves, burning homes and businesses. This sparked gun battles between republican and loyalist paramilitaries, and street fighting between Catholics and Protestants. There was also shooting between republicans and police, and it is claimed that some police patrols fired indiscriminately at Catholic civilians. Seventeen people were killed on 10 July, and a further eleven were killed or fatally wounded over the following week. At least 100 people were injured. About 200 houses were badly damaged or destroyed, leaving 1,000 people homeless. The violence took place just before a truce came into effect, which ended the war in most of Ireland.
Document 9: Dissident republican: Dissident republicans, renegade republicans, anti-Agreement republicans or anti-ceasefire republicans (Irish: "poblachtach easaontach" ) are Irish republicans who do not support the current peace agreements in Northern Ireland. The agreements followed a 30-year conflict known as the Troubles, which claimed over 3,500 lives. During the conflict, republican paramilitary groups such as the Provisional Irish Republican Army waged a campaign to bring about a united Irish republic. Peace negotiations in the 1990s led to an IRA ceasefire in 1994 and to the Good Friday Agreement of 1998. Mainstream republicans, represented by Sinn Féin, supported the Agreement as a means of achieving Irish unity peacefully. 'Dissidents' saw this as an abandonment of republican ideals and acceptance of partition and British rule. They hold that the Northern Ireland Assembly and Police Service of Northern Ireland (PSNI) are illegitimate and see the PSNI as a "British paramilitary police force".
Document 10: 7th Battalion, Ulster Defence Regiment: 7th (City of Belfast) Battalion, Ulster Defence Regiment (7 UDR) 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 (City of Belfast) Battalion, Ulster Defence Regiment.
Document 11: 1st Battalion, Ulster Defence Regiment: 1st (County Antrim) Battalion, Ulster Defence Regiment (1 UDR) 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.
Document 12: Military Reaction Force: The Military Reaction Force, Military Reconnaissance Force or Mobile Reconnaissance Force (MRF) was a covert intelligence-gathering and counter-insurgency unit of the British Army active in Northern Ireland during the Troubles, a former member described it as a "legalised death squad". The unit was formed during the summer of 1971 and operated until late 1972 or early 1973. MRF teams operated in plain-clothes and civilian vehicles, equipped with pistols and submachine guns. They were tasked with tracking down and arresting, or killing, members of the Irish Republican Army (IRA). The MRF also ran double agents within the paramilitary groups and ran a number of front companies to gather intelligence. In October 1972, the Provisional IRA uncovered and attacked two of the MRF's front companies—a mobile laundry service and a massage parlour—which contributed to the unit's dissolution.
Document 13: The Troubles in Magherafelt: A total of eleven people were killed in violence relating to the Northern Irish Troubles in the town of Magherafelt, County Londonderry. Nine were killed by the Irish Republican Army (IRA), including three IRA members killed by the premature explosion of their own bomb while travelling through Magherafelt. One was killed by a non-specific republican group and another by the opposing Ulster Freedom Fighters (UFF). Of the others killed by the IRA, four were Protestant civilians. Three of them were killed in two separate car bomb explosions. The fourth Protestant civilian was shot because his firm was a contractor for the British Army and the Royal Ulster Constabulary (RUC). The IRA's other two victims were both Protestant members of the security forces, one from the RUC and the other from the Ulster Defence Regiment. Both were off duty when killed. The man killed by the UFF was a Sinn Féin councillor who was shot in his workplace. The man killed by the non-specific republican group was a Catholic civilian.
Document 14: Special Reconnaissance Unit: The Special Reconnaissance Unit, also known as the 14 Field Security and Intelligence Company (internally "The Det") was a part of the British Army Intelligence Corps involved in plain-clothes operations in Northern Ireland from the 1970s onwards. The unit conducted undercover surveillance operations against suspected members of Irish republican and loyalist paramilitary groups. Its troops were recruited from line battalions and trained in an eight-week course by the Special Air Service (SAS). An initial deployment of 120 men took place in November 1972. Many allegations of collusion with loyalist paramilitaries were made against the unit. In 1987, the unit became part of the newly formed United Kingdom Special Forces directorate. The unit was amalgamated with the Special Reconnaissance Regiment or SRR in 2005.
Document 15: Northern Ireland civil rights movement: The Northern Ireland civil rights movement dates to the early 1960s, when a number of initiatives emerged which challenged inequality and discrimination in Northern Ireland. The Campaign for Social Justice (CSJ) was founded by Conn McCluskey and his wife, Patricia. Conn was a doctor, and Patricia was a social worker who had worked in Glasgow for a period, and who had a background in housing activism. Both were involved in the Homeless Citizens League, an organisation founded after Catholic women occupied disused social housing. The HCL evolved into the CSJ, focusing on lobbying, research and publicising discrimination. The campaign for Derry University was another mid-1960s campaign.
ground_truth: Britain