However, many of the Irish Catholics continued to reject a deal with the royalists. Owen Roe O'Neill refused to join the new royalist alliance and fought a brief internal civil war with the royalists and Confederates in the summer of 1648. So alienated was O'Neill by what he considered to be a betrayal of Catholic war aims that he tried to make a separate peace with the English Parliament and was for a short time effectively an ally of the English parliamentary armies in Ireland. This was disastrous for the wider aims of the Confederacy, as it coincided with the outbreak of the second civil war in England. The Papal Nuncio, Rinuccini, endeavoured to uphold Owen Roe O'Neill by excommunicating all who in May 1648 took part in the Inchiquin Truce with the Royalists; but he could not get the Irish Catholic Bishops to agree on the matter. On 23 February 1649, he embarked at Galway, in his own frigate, to return to Rome.