Battle of Naseby Confederation through the Cessation Treaty, and Catholic nations in Europe. By publishing this correspondence, entitled "The King's Cabinet Opened", Parliament gained much support in favour of fighting the war to a finish. Within a year, the first civil war ended in a Parliamentarian military victory. Battle of Naseby The Battle of Naseby was a decisive engagement of the English Civil War, fought on 14 June 1645 between the main Royalist army of King Charles I and the Parliamentarian New Model Army, commanded by Sir Thomas Fairfax and Oliver Cromwell. It was fought near the village of Naseby in Northamptonshire. After
John Boys (Royalist) and guns," leaving some of the heavier pieces for use by the garrison. Some time after 14 November 1645, Oliver Cromwell himself turned his attention to the problem of the Royalist stronghold of Donnington castle, and in the following spring a furious bombardment with cannon and mortars was ordered. By 30 March a truce was concluded, and Charles had no option other than to instruct Boys to obtain the best possible surrender. On 1 April 1646, the surrender was completed, wherein garrison was permitted to march to the Royalist garrison at Wallingford with their colours flying and drums beating. Surprisingly,