"Sunday Bloody Sunday" is a song by Irish rock band U2. It is the opening track from their 1983 album War and was released as the album's third single on 21 March 1983 in Germany and the Netherlands. "Sunday Bloody Sunday" is noted for its militaristic drumbeat, harsh guitar, and melodic harmonies. One of U2's most overtly political songs, its lyrics describe the horror felt by an observer of the Troubles in Northern Ireland, mainly focusing on the Bloody Sunday incident in Derry where British troops shot and killed unarmed civil rights protesters, bystanders and children.