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
Oliver Cromwell troop to being one of the principal commanders of the New Model Army, playing an important role under General Sir Thomas Fairfax in the defeat of the Royalist ("Cavalier") 11th forces. Cromwell was one of the signatories of King Charles I's death warrant in 1649, and he dominated the short-lived Commonwealth of England as a member of the Rump Parliament (1649–1653). He was selected to take command of the English campaign in Ireland in 1649–1650. Cromwell's forces defeated the Confederate and Royalist coalition in Ireland and occupied the country, bringing to an end the Irish Confederate Wars. During this period,