October 20, 1775Two Hundred Passengers Are Lost in the Shipwrecks of the Brigs Trevor Totty and Nonpareil
October 20, 1794Duel Between John Gustavus Crosbie and Sir Barry Denny, the Sitting MP, the First Fire Denny Is Shot Fatally
October 20, 1892Birth Near Castleblaney, Co. Monaghan of General Eoin O’Duffy, First Commissioner of the Garda Síochána (Blue Shirts)