1972 Three car bombs are detonated in Claudy, Northern Ireland, killing nine in what is believed to be a Provisional Irish Republican Army attack.
1973 Mountjoy Prison helicopter escape. Three Provisional Irish Republican Army members escape from Mountjoy Prison, Dublin, Republic of Ireland aboard a hijacked helicopter that lands in the exercise yard.
1974 Guildford pub bombings: bombs planted by the Provisional Irish Republican Army (IRA) kill four British soldiers and one civilian.
1979 An IRA bomb kills British World War II admiral Louis Mountbatten, 1st Earl Mountbatten of Burma and 3 others while they are boating on holiday in Sligo, Republic of Ireland. Another bomb near Warrenpoint, Northern Ireland kills 18 British soldiers.
1984 Brighton hotel bombing: The Provisional Irish Republican Army attempt to assassinate Prime Minister Margaret Thatcher and her cabinet. Thatcher escapes but the bomb kills five people and wounds 31.
1985 The Provisional Irish Republican Army carries out a mortar attack on the Royal Ulster Constabulary police station at Newry, killing nine officers in the highest loss of life for the RUC on a single day.
1987 Remembrance Day Bombing: A Provisional IRA bomb explodes in Enniskillen, Northern Ireland during a ceremony honouring those who had died in wars involving British forces. Twelve people are killed and sixty-three wounded.
1989 Attack on Derryard checkpoint: The Provisional Irish Republican Army launch an attack on a British Army permanent vehicle checkpoint near Rosslea, Northern Ireland. Two British soldiers are killed and one badly wounded.
1992 A large Provisional Irish Republican Army bomb destroys forensic laboratories in Belfast.
1994 The Provisional Irish Republican Army declares a ceasefire.
2005 The Provisional Irish Republican Army calls an end to its thirty year long armed campaign in Northern Ireland.