Royalists planned an uprising in Ireland and sought to turn Henry Cromwell and Lord Broghill (who was in contact with the King's court in the summer of 1659) towards the cause but the plan came to aught. Henry Cromwell left Ireland in June 1659. Broghill showed reluctance to declare for the King, but nevertheless republicans were suspicious of him following Booth's revolt in England in 1659.
Sir Theophilus Jones, a former soldier under Charles I of Ireland and governor of Dublin during the republic, seized Dublin Castle with a group of officers and declared for Parliament. Acting in Charles II's interest, Sir Charles Coote seized Galway while Lord Broghill held firm in Munster. On 9 January 1660 a council of officers declared Edmund Ludlow a traitor, and he fled to England. The regicide Hardress Waller re-took Dublin Castle in February 1660 but with little support he surrendered to Sir Charles Coote. Waller along with fellow regicide John Cook was arrested and sent to England. The officers in Dublin supported General Monck.
The army was purged of radicals and a Convention Parliament called. Coote sought to move the Convention Parliament towards restoration, but his rival Broghill did not openly declare for the King until May 1660.
In February 1660 Coote sent a representative to King Charles II in the Netherlands and invited him to make an attempt on Ireland, but the King regarded it as inexpedient to try and reclaim Ireland before England. At the same time Broghill sent his brother to invite the King to land at Cork. In March 1660 a document was published asking for the King's return, "begged for his forgiveness, but stipulated for a general indemnity and the payment of army arrears".
"The commonwealth parliamentary union was, after 1660, treated as null and void". As in England the republic was deemed constitutionally never to have occurred. The Convention Parliament was dissolved by Charles II in January 1661, and he summoned his first parliament in Ireland in May 1661.