Bloody Sunday
From Longman Dictionary of Contemporary EnglishBloody SundayˌBloody ˈSunday Sunday, 30th January 1972, when British soldiers in Northern Ireland used force to control a large crowd of people who were protesting against the policy of internment (=putting people in prison without a trial if they were believed to be members of the IRA). 13 people were killed when the soldiers fired at the crowd.