Rebellion broke out in Ulster in October 1641 and spread through Ireland amid attacks, reprisals and reports of atrocities. News reaching London generated intense fear of Catholic conspiracy and disagreement over who should command an army of suppression. That dispute helped drive king and Parliament towards armed conflict in England.

Printed depositions, newsbooks and atrocity narratives strongly shaped English perceptions of Catholicism and Ireland. Their often sensational language entered sermons, ballads and poems, deepening the confessional bitterness of Civil War literature.