May – the largest Irish guerrilla forces under John Fitzpatrick (in Leinster), Edmund O'Dwyer (in Munster) and Edmund Daly (in Connacht) surrender, under terms signed at Kilkenny, allowing Irish troops to go abroad to serve in foreign armies not at war with the Commonwealth of England.
May 14 – Lieutenant-Colonel "Prime-Iron" James Rochfort, Cromwellian soldier, executed by firing squad following a court martial for killing a fellow officer in a duel.