Their great advantages in the north seemed to second their ambition, and finally to promise them success in their unwarrantable enterprizes. Manchester, having taken Lincoln, had united his army to that of Leven and Fairfax; and York was now closely besieged by their combined forces. That town, though vigorously defended by Newcastle, was reduced to extremity; and the parliamentary generals, after enduring great losses and fatigues, flattered themselves, that all their labours would at last be crowned by this important conquest. On a sudden, they were alarmed by the approach of prince Rupert. This gallant commander, having vigorously exerted himself in Lancashire and Cheshire, had collected a considerable army; and joining Sir Charles Lucas, who commanded Newcastle's horse, hastened to the relief of York with an army of 20,000 men. The Scottish and parliamentary generals raised the siege, and drawing up on Marston-moor, purposed to give battle to the royalists. Prince Rupert approached the town by another quarter, and interposing the river Ouse between him and the enemy, safely joined his forces to those of Newcastle. The marquess endeavoured to persuade him, that, having so successfully effected his purpose, he ought to be content with the present advantages, and leave the enemy, now much diminished by their losses, and discouraged by their ill success, to dissolve by those mutual dissensions, which had begun to take place among them[21]. The prince, whose martial disposition was not sufficiently tempered with prudence, nor softened by complaisance, pretending positive orders from the king, 2d July. without deigning to consult with Newcastle, whose merits and services deserved better treatment, immediately issued orders for battle, and led out the army to Marston-moor[22]. Battle of Marston-moor. This action was obstinately disputed between the most numerous armies, that were engaged during the course of these wars; nor were the forces on each side much different in number. Fifty thousand British troops were led to mutual slaughter; and the victory seemed long undecided between them. Prince Rupert, who commanded the right wing of the royalists, was opposed to Cromwell[23], who conducted the choice troops of the parliament, enured to danger under that determined leader, animated by zeal, and confirmed by the most rigid discipline. After a sharp combat, the cavalry of the royalists gave way; and such of the infantry, as stood next them, were likewise borne down, and put to flight. Newcastle's regiment alone, resolute to conquer or to perish, obstinately kept their ground, and maintained, by their dead bodies, the same order, in which they had at first been ranged. In the other wing, Sir Thomas Fairfax and Colonel Lambert, with some troops, broke through the royalists; and, transported by the ardour of pursuit, soon reached their victorious friends, engaged also in pursuit of the enemy. But after that tempest was past, Lucas, who commanded the royalists in this wing, restoring order to his broken forces, made a furious attack on the parliamentary cavalry, threw them into disorder, pushed them upon their own infantry, and put that whole wing to rout. When ready to seize on their carriages and baggage, he perceived Cromwell, who was now returned from pursuit of the other wing. Both sides were not a little surprised to find, that they must again renew the combat for that victory, which each of them thought they had already obtained. The front of the battle was now exactly counter-changed; and each army occupied the ground which had been possessed by the enemy at the beginning of the day. This second battle was equally furious and desperate with the first: But after the utmost efforts of courage by both parties, victory wholly turned to the side of the parliament. The prince's train of artillery was taken; and his whole army pushed off the field of battle[24].