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Events on Monday 9 August 1971 1
1971Internment Introduced in Northern IrelandOperation Demetrius detains suspects without trialBritish and Northern Irish security forces launched Operation Demetrius, arresting and interning hundreds of suspected republican paramilitaries without trial. The operation, which overwhelmingly targeted the Catholic nationalist community, inflamed sectarian tensions and fueled recruitment for the IRA. It marked a significant escalation of the Troubles.