Montrose arrived a day too late for Marston Moor (2nd of July 1644); Rupert took his contingent; he entered Scotland in disguise, met the ill-armed Irish levies under Colkitto, raised the Gordons and Ogilvies, who supplied his cavalry, raised the fighting Macdonalds, Camerons and Macleans; in six pitched battles he routed Argyll and all the Covenanting warriors of Scotland, and then, deserted by Colkitto and the Gordons, and surprised by Leslie's cavalry withdrawn from England, was defeated at Philiphaugh near Selkirk, while men and women of his Irish contingent were shot or hanged months after the battle.
He was shortly afterwards made lieutenant-colonel, and charged at the head of his regiment at Marston Moor (2nd July), where he was wounded and rescued with difficulty.
Until his fiery energy made itself felt, hardly any army on either side actually suffered rout; but at Marston Moor and Naseby the troops of the defeated party were completely dissolved, while at Worcester the royalist army was annihilated.
William Gascoigne's invention of the filar micrometer and of the adaptation of telescopes to graduated instruments remained submerged for a quarter of a century in consequence of his untimely death at Marston Moor (1644).
Gascoigne was killed at the battle of Marston Moor on the 2nd of July 1644, in the twenty-fourth year of his age, and his untimely death was doubtless the cause that delayed the publication of a discovery which anticipated, by twenty years, the combined work of Huygens, Malvaison, Auzout and Picard in the same direction.
At Marston Moor on the 2nd of July he commanded all the horse of the Eastern Association, with some Scottish troops; and though for a time disabled by a wound in the neck, he charged and routed Rupert's troops opposed to him, and subsequently went to the support of the Scots, who were hard pressed by the enemy, and converted what appeared at one time a defeat into a decisive victory.
At Marston Moor Lucas swept Fairfax's Yorkshire horse before him, but later in the day he was taken prisoner.
After the battle of Marston Moor it was taken by Fairfax, and in 1648 it was ordered to be dismantled.
It was taken by the Royalists in 1643, but after the victory of Marston Moor was yielded to a detachment of the Parliamentary forces.
The movements of Manchester of ter Marston Moor were marked by great apathy.