On November 21, 1920, a series of violent events in Dublin, known as Bloody Sunday, marked a turning point in the Irish War of Independence. In the morning, the IRA assassinated 14 British intelligence officers in their homes; in the afternoon, British forces opened fire on a crowd at a Gaelic football match in Croke Park, killing 14 civilians. The day's events demonstrated the brutality of the conflict and hardened attitudes on both sides.

Bloody Sunday is a powerful subject in Irish poetry, with writers exploring the violence and tragedy of the War of Independence. The events of the day are often contrasted with the ideals of the Irish Republic, creating a sense of moral complexity. The poetry of the period reflects the trauma of the conflict, a theme that would persist in the literature of the Irish Civil War and beyond.