The Explorers' Club, № DCCLXXXVI

Operation AXIOM: Between the Wars—The Anglo-Irish War, Part II
21 November 1920: Bloody Sunday—Early in the morning, "the Squad," an Irish Republican Army (I.R.A.) assassination unit, murdered fourteen British agents, retroactively known as the "Cairo Gang," at their lodgings throughout Dublin; that afternoon, the Royal Irish Constabulary massacred fourteen civilians at a Gaelic football match; that night, three I.R.A. prisoners were murdered in Dublin Castle.

Commentary: The Gaelic Athetic Association held a centenary commenoration at Croke Park on 21 November 2020. It was a shameful occasion of selective forgetting, rightly remembering the victims of the Croke Park massacre but disgracefully overlooking the victims of the I.R.A. assassination campaign.

Bonus! Song o' Bloody Sunday
Mick Moloney, "There Were Roses" from Green Linnet Records: The Twentieth Anniversary Collection (Mike Papa Whiskey)

Lest we forget.