Henry was an inveterate and formidable enemy to the interests of Wales. He speedily employed his utmost force in attempting to subjugate the Cambrian people; and it is recorded of Madog ab Meredydd, Prince of Powys, who had united with the enemies of his country, that he incited the English king to an invasion of North Wales. Henry listened to the solicitations of the Powysian prince, and eagerly exerted every means for the conquest of the country. He quickly raised a powerful army, and marched without delay into North Wales. Mathew Paris states that the levy of Henry, raised at this time, amounted to 30,000 men. Owain Gwynedd, in this campaign, gallantly led the Welsh, and in one of the actions, at _Coed Euloe_, near Hawarden, Flintshire, the monarch himself, who had encamped near the field of battle, escaped from the hands of the Welsh with the greatest difficulty. The English forces, having been strengthened, pursued the Welsh, and at length Prince Owain, fearful that his army would perish for want of provisions, concluded a peace with the King of England. He himself and his chieftains submitted to do homage to Henry, and to yield up the castles and districts in North Wales which, in the last reign, had been obtained from the English. Lord Lyttleton tells us, that to complete this humiliating position, Owain was obliged to deliver up two of his sons as pledges of his future obedience. The year after this important event a general peace took place between England and Wales; the princes and all the chieftains of South Wales repaired to the court of England, where Henry granted peace, on the Welsh doing homage for their own territories, and formally ceding to him the districts recovered from the English in the last reign. This peaceful state of things was but of short duration. Rhys, the son of Grufydd ab Rhys, immediate heir to the sovereign power of South Wales, having been outraged by several English lords, threw off his allegiance, commenced a revolt, and rallied around him a numerous force, which perplexed and baffled the English monarch. Shortly afterwards, fired by the gallant example of Rhys, the Prince of North Wales (Owain Gwynedd), and all his sons, his brother Cadwaladr, and the chieftains of Powys, united with him, in the endeavour to regain their independence and honour. After some slight skirmishes with the Welsh, Henry gathered together a formidable force, with which he marched into Powys, breathing slaughter and extermination against the inhabitants. All the historical writers, in describing this fearful onslaught, admit that few events of ancient times were more deeply stained with the blood of innocence. The English army, formed of the choicest troops, from Normandy, Anjou, Flanders, Brittany, and other territories which Henry possessed in France, entered the Welsh confines at Oswestry, where it was encamped for some time. The forces of North Wales were collected under the command of Owain Gwynedd