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 in July 1644, Cromwell had risen to the rank of Lieutenant General of horse in Manchester's army. The success of his cavalry in breaking the ranks of the Royalist cavalry and then attacking their infantry from the rear at Marston Moor was a major factor in the Parliamentarian victory. Cromwell fought at the head of his troops in the battle and was slightly wounded in the neck, stepping away briefly to receive treatment during the battle but returning to help force the victory. After Cromwell's nephew was killed at Marston Moor he wrote a famous letter to his brother-in-law. Marston