On this day, January 30, in 1972 British soldiers shot dead 14 peaceful protesters in Derry. It is often known as the Bogside Massacre.

Often referred to as the Bogside Massacre, Bloody Sunday took place on January 30, 1972, when British paratroopers opened fire on a peaceful protest organized by the Northern Ireland Civil Rights Association, protesting the poor treatment of Catholics in Northern Ireland. Fourteen in total were killed, 13 dying instantly and a further person dying four months later as a result of his injuries.

One of the most iconic images of the day came in the form of Edward Daly, the Catholic priest photographed waving a bloodstained handkerchief as he attempted to bring one of those injured to safety.

Read more: What does Bloody Sunday Derry stand for today?

Grieving relatives of the victims of the Bloody Sunday massacre when British Paratroopers shot dead 13 civilians on a civil rights march in Derry City. (Photo by M. Stroud/Express/Getty Images)

Grieving relatives of the victims of the Bloody Sunday massacre when British Paratroopers shot dead 13 civilians on a civil rights march in Derry City. (Photo by M. Stroud/Express/Getty Images)

The then Fr. Daly had attended many several civil right marches in the build-up to Bloody Sunday and was present when British soldiers began to fire on the unarmed citizens. Images of the 39-year-old Daly trying to bring the mortally wounded Jackie Duddy to safety were broadcast all over the world.

The priest’s later testimony that the British soldiers fired on the crowd with no provocation was rejected by the British government in 1972, but Daly continued to tell his story, eventually being proven accurate in 2010 following a $265 million, 12-year investigation.

A protest demonstration in London against the Bloody Sunday massacre when 13 civilians on a civil rights march were shot dead by the British Paratroopers in Derry City. (Photo by Central Press/Getty Images)

A protest demonstration in London against the Bloody Sunday massacre when 13 civilians on a civil rights march were shot dead by the British Paratroopers in Derry City. (Photo by Central Press/Getty Images)

The inquiry found that there was no justification for firing at the protestors and then British Prime Minister David Cameron formally apologized to the families of those killed or injured. It has since been confirmed that the families will also receive compensation.

Read more: Irish priest pictured waving bloodstained-handkerchief on Bloody Sunday dies aged 82

A British soldier drags a Catholic protester during the 'Bloody Sunday' killings January 30, 1972, when British paratroopers shot dead 13 Catholics civil rights marchers in Londonderry.THOPSON/AFP/Getty Images