hat was the most important reason that the parliamentarians won the Battle of Naseby? Why does this suggest they went on to win the war overall?

The most important reason that the Parliamentarians won the Battle of Naseby was due to their superior military organization. The New Model Army, led by Sir Thomas Fairfax and his deputy Oliver Cromwell, was a well-disciplined and effectively coordinated force. They had a clear chain of command and a strong sense of purpose, which gave them a significant advantage over the Royalist forces.

The Battle of Naseby, which took place on 14 June 1645, was a decisive engagement of the English Civil War. The Parliamentarians' New Model Army, approximately 15,000 strong, defeated the Royalist forces of about 9,000 men. The Royalists lost their artillery and baggage train, and most importantly, their infantry, which was a severe blow from which they never fully recovered.

This suggests that they went on to win the war overall because the victory at Naseby effectively destroyed the King's principal army. After this defeat, the Royalists were never able to mount a military challenge of the same scale. The superior organization and discipline of the New Model Army, demonstrated at Naseby, continued to give them the upper hand in subsequent battles. This, combined with their control of the navy and thus the country's trade routes, meant that the Parliamentarians could also better sustain their war effort economically.

In conclusion, the Parliamentarians' superior military organization was a key factor in their victory at the Battle of Naseby, and this advantage, along with their economic resources, helped them to eventually win the English Civil War.