Battle of Naseby. The Battle of Naseby was a decisive engagement of the First 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 the Royalists stormed the Parliamentarian town of Leicester on 31st May 1645, Fairfax was ordered to lift his siege of Oxford, the Royalist capital, and engage the King's main army.
Eager to bring the Royalists to battle, Fairfax set off in pursuit of the Royalist army, which was heading to recover the north. The King, faced with retreating north with Fairfax close behind, or giving battle, decided to give battle, fearing a loss of morale if his army continued retreating.
After hard fighting, the Parliamentarian army had effectively destroyed the Royalist force, which suffered 7,000 casualties out of 7,400 effectives. Charles lost the bulk of his veteran infantry and officers, all of his artillery and stores, his personal baggage and many arms, ensuring the Royalists would never again field an army of comparable quality.
Captured in the baggage train were the King's private papers, revealing to the fullest extent his attempts to draw Irish Catholics and foreign mercenaries into the war. Publication of these papers gave Parliament an added moral cause in fighting the war t