Question: When was the group attacked in the attack on the Four Square Laundry formed?

full_context: Document 1: 1997 Coalisland attack: On the evening of 26 March 1997, the Provisional IRA East Tyrone Brigade launched an improvised grenade attack on the fortified Royal Ulster Constabulary/British Army base in Coalisland, County Tyrone, Northern Ireland. The blast sparked an immediate reaction by an undercover Special Air Service unit, who shot and wounded Gareth Doris, an Irish republican and alleged IRA volunteer. The SAS unit was then surrounded by a crowd of protesters who prevented them approaching Doris or leaving. RUC officers arrived and fired plastic bullets at the crowd, allowing the special forces to leave the area.
Document 2: South Armagh Republican Action Force: The South Armagh Republican Action Force was an alleged Irish republican paramilitary group that was active from September 1975 to April 1977 during the Troubles in Northern Ireland. Its area of activity was mainly the southern part of County Armagh. According to writers such as Ed Moloney and Richard English, it was a covername used by some members of the Provisional IRA South Armagh Brigade. The journalist Jack Holland, however, alleged that the group was made up of members of the Irish National Liberation Army (INLA). According to Malcolm Sutton's database at CAIN, it was responsible for 24 deaths during the conflict, all of whom were classified as civilians.
Document 3: Attack on the Four Square Laundry: The Attack on the Four Square Laundry was a Provisional IRA ambush in the Twinbrook area of Belfast against a special British Military unit known as the Military Reaction Force. At least one undercover British soldier (Edward Stuart (20)) was killed, the IRA claimed they killed 5 undercover soldiers altogether. The attack took place on 2 October 1972.
Document 4: 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 5: Provisional Irish Republican Army: The Provisional Irish Republican Army (Provisional IRA) was an Irish republican paramilitary organization that sought to remove Northern Ireland from the United Kingdom and to bring about an independent socialist republic encompassing all of Ireland. It was the biggest and most active republican paramilitary group during the Troubles. It saw itself as the successor to the original IRA and called itself simply the Irish Republican Army (IRA), or "Óglaigh na hÉireann" in Irish, and was widely referred to as such by others.
Document 6: New Lodge Six shooting: In the late hours of 3 February and the early hours of 4 February 1973, six men, all of whom were Catholics, were shot and killed in the New Lodge area of north Belfast, four (one IRA member and three civilians) of them were shot dead at the junction at Edlingham Street by British Army snipers, the other two men were shot dead by the Ulster Defence Association (UDA). Irish Nationalists and Republicans believe that collusion took place between the British security forces and Loyalist paramilitaries in the shootings. The six men who were killed became known as "The New Lodge Six".
Document 7: Israel's Secret Wars: It explores the role of secret intelligence and covert activities in the Zionist movement before independence and explore the operational and political histories all three major Israeli intelligence agencies Aman (military intelligence), Mossad (foreign intelligence and covert operations) and Shin Bet (internal security).
Document 8: 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 9: 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 10: Corporals killings: British Army corporals David Howes and Derek Wood were killed by the Provisional IRA on 19 March 1988 in Belfast, Northern Ireland, in an event which became known as the corporals killings. The off-duty soldiers were wearing plain-clothes when they were killed by the IRA after encountering the funeral procession of an IRA member whilst returning from Belfast to Lisburn. Three days before, loyalist paramilitary Michael Stone had attacked an IRA funeral and killed three people. Believing the soldiers were loyalists intent on repeating Stone's attack, dozens of people surrounded and attacked their car. During this, Corporal Wood drew his service pistol and fired a shot in the air. The soldiers were then dragged from the car, beaten, and taken to nearby waste ground where they were stripped and shot dead.
Document 11: 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 12: Special Mission Unit: The term Special Mission Unit or Special Missions Unit (SMU) is used to describe some elite special operations forces around the world. The term has been applied to the Australian Defence Force's Special Air Service Regiment and five United States special operations forces units. Special mission units have been involved in high profile military operations such as the death of Osama Bin Laden and capture of Saddam Hussein.
Document 13: Batallón de Inteligencia 601: The Batallón de Inteligencia 601 (Spanish for "601 Intelligence Battalion") was a special military intelligence service of the Argentine Army whose structure was set up in the late 1970s, active in the Dirty War and Operation Condor, and disbanded in 2000. Its personnel collected information on and infiltrated guerrilla groups and human rights organisations, and coordinated killings, kidnappings and other abuses.
Document 14: Thiepval barracks bombing: The Thiepval Barracks bombing was a double car bomb attack carried out by the Provisional Irish Republican Army (IRA) on 7 October 1996. The bombs exploded inside Thiepval Barracks, the British Army headquarters in Northern Ireland. One British soldier was killed and 31 people were injured. This bombing was the first major attack on a military base in Northern Ireland since the ending of the IRA's ceasefire on 9 February 1996, when it exploded a large bomb in London's Docklands.
Document 15: Bloody Sunday (1972): Bloody Sunday – sometimes called the Bogside Massacre – was an incident on 30 January 1972 in the Bogside area of Derry, Northern Ireland, when British soldiers shot 28 unarmed civilians during a peaceful protest march against internment. Fourteen people died: thirteen were killed outright, while the death of another man four months later was attributed to his injuries. Many of the victims were shot while fleeing from the soldiers and some were shot while trying to help the wounded. Other protesters were injured by rubber bullets or batons, and two were run down by army vehicles. The march had been organised by the Northern Ireland Civil Rights Association (NICRA). The soldiers involved were members of the 1st Battalion, Parachute Regiment, also known as "1 Para".
ground_truth: summer of 1971