On Bloody Sunday , an OIRA man in Derry is believed by the Saville Inquiry to have fired a shot with a revolver at British troops , after they had shot dead 13 civil rights demonstrators the only republican shots fired on the day and contrary to his orders . The anger caused by Bloody Sunday among Irish people was such that the Official IRA announced that it would launch an " offensive " against British forces
Bloody Sunday
Bloody Sunday (1972)
Official Irish Republican Army