30 January – Bloody Sunday: Thirteen unarmed civilians are shot dead in Derry as British paratroopers open fire on a banned civil rights march. A fourteenth, John Johnston, is also to die some months later after having been shot by a paratrooper.
9 February – A day of disruption takes place in Northern Ireland as people take to the streets in protest.
19 April – A report by the Lord Chief Justice, Lord Widgery, into the Bloody Sunday shootings exonerates the British troops of blame because the demonstration had been illegal.[4] This report will be completely discredited by the Saville Inquiry published on 15 June 2010, on which day the British prime minister David Cameron will acknowledge in the House of Commons, among other things, that the paratroopers had fired the first shot, had fired on fleeing unarmed civilians, and shot and killed one man who was already wounded; he will then apologise on behalf of the British Government.
24 June - Dungiven landmine and gun attack Three British soldiers were killed and two injured when their mobile patrol struck a Provisional IRA landmine near Dungiven. Two other soldiers were injured when IRA snipers opened fire on the patrol after the blast.
9 July – End of British–IRA ceasefire. Start of Battle of Lenadoon which lasts until 14 July, with a total of 28 people, civilians, soldiers & paramilitaries all being killed. The Springhill massacre in which British Army snipers killed five unarmed civilians & injured two others occurred during this period on 9 July just a few hours after the ceasefire broke down.[2]
19 July – A five-month-old boy, Alan Jack, is killed when an IRA car bomb explodes on Canal Street in Strabane. He is the youngest victim of the Troubles up to this point.[7]
21 July – Bloody Friday: Nine people die and over one hundred are injured in a series of Provisional IRA explosions in Belfast city centre.
Claudy bombing ("Bloody Monday"), 10:00AM: Three car bombs in Claudy, County Londonderry, kill six immediately with three dying later in hospital. It becomes public knowledge only in 2010 that a local Catholicpriest was an IRA officer believed to be involved in the bombings but his role was covered up by the authorities.[9]
25 September – Darlington conference on the future of Northern Ireland opens.
7 December – Murder of Jean McConville: Provisional Irish Republican Army volunteers, including women, take a recently-widowed mother-of-10, who they claim to be an informer, in Belfast at gunpoint. She is shot in the head and buried secretly across the Irish border. There is no police investigation of the crime until 1995.
20 December - In a Catholic enclave in the majority Protestant Waterside area of Derry City the UDA shot dead five civilians in a pub, killing four Catholics & one Protestant and injuring several others in what became known as Annie's Bar Massacre. See: Top of the Hill bar shooting for more information.
28 December – In Belturbet, Co. Cavan, Geraldine O'Reilly, 15, from Cavan, and Patrick Stanley, 16, from Offaly are murdered by an unclaimed bomb.
1972 is the worst year for casualties in The Troubles, with 479 people killed (including 130 British soldiers) and 4,876 injured.[11]
David McKittrick, Lost lives: the stories of the men, women and children who died as a result of the Northern Ireland troubles (Edinburgh: Mainstream, 1999), p. 228