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

Context paragraphs:
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).

Mark Covert: Mark Covert (born November 17, 1950) is an American runner.  He is believed to maintain the second-longest streak of running every day in the world.  Covert's running streak began on July 23, 1968 just after his senior year at Burbank High School in Burbank, California, and continued for exactly 45 years.  Due to a chronic foot injury, Covert announced that he would end his streak after exactly 45 years on July 23, 2013 and he did as promised.  His is the longest streak recorded by the United States Running Streak Association, followed closely by Jon Sutherland, who began less than a year after Covert.  However, British runner Ron Hill is believed to have the longest continuous streak.

2013 heatwave in Ireland and the United Kingdom: The 2013 heat wave in the United Kingdom and Ireland was a period of unusually hot weather primarily in July 2013, with isolated warm days in June and August.  A prolonged high pressure system over Britain and Ireland caused higher than average temperatures for 19 consecutive days in July, reaching 33.5°C at Heathrow and Northolt.  Following a brief period of cooler weather at the end of July, temperatures temporarily rose again, peaking at 34.1°C on 1 August in the United Kingdom, the warmest the country had seen since July 2006, and 31.0°C in Ireland.  At 19 days, the July heatwave was the longest continuous period of hot weather in the UK since August 1997.

Shankill Butchers: The Shankill Butchers was an Ulster loyalist gang—many of whom were members of the Ulster Volunteer Force (UVF)—that was active between 1975 and 1982 in Belfast, Northern Ireland.  It was based in the Shankill area and was responsible for the deaths of at least 23 people, most of whom were killed in sectarian attacks.  The gang was notorious for kidnapping and murdering random Catholic and suspected Catholic civilians; each was beaten ferociously and had his throat hacked with a butcher's knife.  Some were also tortured and attacked with a hatchet.  The gang also killed six Ulster Protestants over personal disputes, and two other Protestants mistaken for Catholics.  Most of the gang were eventually caught and, in February 1979, received the longest combined prison sentences in United Kingdom legal history.  However, gang leader Lenny Murphy and his two chief "lieutenants" escaped prosecution.  Murphy was killed in November 1982 by the Provisional IRA, likely acting with loyalist paramilitaries who perceived him as a threat.  The Butchers brought a new level of paramilitary violence to a country already hardened by death and destruction.  The judge who oversaw the 1979 trial described their crimes as "a lasting monument to blind sectarian bigotry".

History of the Orange Institution: The Orange Institution, better known as the Orange Order, is a Protestant fraternal organisation based in Northern Ireland.  It has been a strong supporter of Irish unionism and has had close links with the Ulster Unionist Party, which governed Northern Ireland from 1922 to 1972.  The Institution has lodges throughout Ireland, although it is strongest in the North.  There are also branches throughout the British Commonwealth (especially in Scotland and Canada), and in the United States.  In the 20th century, the Institution went into sharp decline outside Northern Ireland and County Donegal.  Observers have accused the Orange Institution of being a sectarian organisation, due to its goals and its exclusion of Roman Catholics and close relatives of Catholics as members.  The Order has a substantial fraternal and benevolent component.

Terence O'Neill: Terence Marne O'Neill, Baron O'Neill of the Maine, PC (10 September 1914 – 12 June 1990) was the fourth Prime Minister of Northern Ireland and leader (1963–1969) of the Ulster Unionist Party (UUP).  A moderate unionist, who sought to reconcile the sectarian divisions in Northern Ireland society, he was Member of the Parliament of Northern Ireland for the Bannside constituency from 1946 until his forced resignation in April 1969 as communal conflict erupted; his successor in Parliament was Ian Paisley, while control of the UUP also passed to more hard-line elements.

2001 Oldham riots: The 2001 Oldham riots were a short but intense period of violent rioting which occurred in Oldham, a town in Greater Manchester, England, in May 2001.  They were the worst ethnically-motivated riots in the United Kingdom since 1985, briefly eclipsing the sectarian violence seen in Northern Ireland.

John Weir (loyalist): John Oliver Weir (born 1950) is an Ulster loyalist born in the Republic of Ireland.  He served as an officer in Northern Ireland's Royal Ulster Constabulary's (RUC) Special Patrol Group (SPG) (a tactical reserve unit), and was a volunteer in the illegal Ulster Volunteer Force (UVF).  As a member of the UVF's Mid-Ulster Brigade led by Robin "the Jackal" Jackson, Weir was a part of the Glenanne gang, a group of loyalist extremists that carried out sectarian attacks mainly in the County Armagh area in the mid-1970s.  Along with his RUC colleague Billy McCaughey, Weir was convicted of the 1977 sectarian killing of Catholic chemist William Strathern and sentenced to life imprisonment.  Weir's affidavit which implicated Jackson, other members of the Glenanne gang, soldiers of the Ulster Defence Regiment (UDR), and his colleagues in the RUC and SPG, in a series of sectarian attacks, including the Dublin and Monaghan bombings, was published in the 2003 Barron Report, the findings of an official investigation into the 1974 car bombings commissioned by Irish Supreme Court Justice Henry Barron.

May–June 1917 tornado outbreak sequence: The 1917 May–June tornado outbreak sequence was an eight-day tornado event, known as a tornado outbreak sequence, that killed at least 383 people, mostly in the Midwestern and parts of the Southeastern United States.  It was the most intense and the longest continuous tornado outbreak sequence on record, with at least 73 tornadoes including 15 that were analyzed to have been violent (F4–F5) based upon reported damage.  The deadliest tornado of the entire sequence produced a 155 mi track across Illinois, killing 101 people and devastating the towns of Charleston and Mattoon along with small farming communities.  Once believed to have traveled 290 mi cross Illinois and into Indiana, it is now assessed to have been a tornado family of four to eight separate tornadoes.

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.

Supporting paragraphs: Operation Banner 1969 Northern Ireland riots
Answer: Britain