When one thinks of Bloody Sunday, what usually comes to mind is the 1972 civil rights march in Derry, where English soldiers opened fire on marchers and brutally murdered fourteen innocent people. This incident shocked the world and spilled over into pop culture leading to multiple songs, movies, documentaries and more – making it one of the most notorious moments in Irish history. It was not the first “Bloody Sunday” in Ireland, but (thankfully) it was the last. There have been four dreadful days known as Bloody Sunday in recent Irish history and the second (and most deadly) one occurred on this date, November 21st, 1920, in Dublin.