Bloody Sunday, or the Bogside Massacre,[1] was an incident on 30 January 1972 in the Bogside area of Derry, Northern Ireland, when British soldiers shot 28 unarmed civilians during a 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.[2] Other protesters were injured by rubber bullets or batons, and two were run down by army vehicles.[3][4] All of those shot were Catholics. The march had been organised by the Northern Ireland Civil Rights Association (NICRA). The soldiers were from the 1st Battalion, Parachute Regiment ("1 Para"). This battalion was involved in two other controversial shootings: the Ballymurphy massacre several months before, and the killing of Protestant civilians in the Shankill several months later.

https://en.wikipedia.org/wiki/Bloody_Sunday_(1972)