Allied (Parliamentarian and Scottish Covenanter) forces approximately 24,500; Royalist forces approximately 17,500.
The Battle of Marston Moor was fought on 2 July 1644, during the Wars of the Three Kingdoms of 1639–1653. The combined forces of the English Parliamentarians under Lord Fairfax and the Earl of Manchester and the Scottish Covenanters under the Earl of Leven defeated the Royalists commanded by Prince Rupert of the Rhine and the Marquess of Newcastle.
During the summer of 1644, the Covenanters and Parliamentarians had been besieging York, which was defended by the Marquess of Newcastle. Rupert had gathered an army which marched through the northwest of England, gathering reinforcements and fresh recruits on the way, and across the Pennines to relieve the city. The convergence of these forces made the ensuing battle the largest of the civil wars.
On 1 July, Rupert outmanoeuvred the Covenanters and Parliamentarians to relieve the city. The next day, he sought battle with them even though he was outnumbered. He was dissuaded from attacking immediately and during the day both sides gathered their full strength on Marston Moor, an expanse of wild meadow west of York. Towards evening, the Covenanters and Parliamentarians themselves launched a surprise attack. After a confused fight lasting two hours, Parliamentarian cavalry under Oliver Cromwell routed the Royalist cavalry from the field and, with Leven's infantry, annihilated the remaining Royalist infantry.
After their defeat the Royalists effectively abandoned Northern England, losing much of the manpower from the northern counties of England (which were strongly Royalist in sympathy) and also losing access to the European continent through the ports on the North Sea coast. Although they partially retrieved their fortunes with victories later in the year in Southern England, the loss of the north was to prove a fatal handicap the next year, when they tried unsuccessfully to link up with the Scottish Royalists under the Marquess of Montrose.
In Northern England the Royalists had the advantage in numbers and local support, except in parts of Lancashire and the West Riding of Yorkshire, where the Parliamentarians had support from the clothing-manufacturing towns which "naturally maligned the gentry". On 30 June 1643, the Royalists commanded by the Marquess of Newcastle defeated the Parliamentarian army of Lord Fairfax at the Battle of Adwalton Moor near Bradford. Fairfax and his son, Sir Thomas Fairfax, fled with their remaining forces to the port of Hull, which was held for Parliament.
Newcastle sent some of his army south into Lincolnshire, as part of a planned "three-pronged" advance on London, but was forced to besiege Hull with most of his forces. The siege failed, as the Parliamentarian navy could supply and reinforce the port and the garrison flooded wide areas around the city, while the Royalist detachments sent into Lincolnshire were defeated at the battles of Gainsborough and Winceby.
The site of Battle of Marston Moor 1644 lies on Triassic Rocks (Undifferentiated), bedrock that formed in the Triassic. The rock here is sandstone and conglomerate, interbedded.
This battlefield is listed on the Register of Historic Battlefields — a national designation identifying Britain's most significant battle sites for protection and further research. Reference: NHLE 1000020.
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