In 1265 he had received the oaths of fealty throughout Wales, which was now once more an independent principality. But he made at this point a fatal mistake. He did not appreciate the strength and determination of Edward I., the son of the feeble Henry, and in place of making favourable terms with him he intrigued against him with some revolted barons.
But Edward was a man of different metal from his father, and he declared war against Llewelyn, and in 1277 invaded Wales.
Three formidable armies poured in, and Llewelyn was driven to take refuge among the wilds of Snowdon, where he was starved into submission. All might have gone smoothly thenceforth had Edward been just. But he was ungenerous and harsh. He suffered his officials to treat the Welsh with such brutality that their condition became intolerable. Appeals for redress that were made to him were contemptuously set aside, and the Welsh princes and people felt that it would be better to die with honour than to be treated as slaves.
A general revolt broke out. In 1282 Llewelyn took the castles of Flint, Rhuddlan, and Hawarden in the north, and Prince Gruffydd rose against the English in the south.
Edward I. resolved on completely and irretrievably crushing Wales under his heel. He entered it with a large army, and again drove Llewelyn into the fastnesses of Snowdon. Llewelyn thence moved south to join forces with the Welsh of Dyved, leaving his brother David to hold the king back in North Wales.
The place appointed for the junction was near Builth, in Brecknock, but he was betrayed into a trap and was surrounded and slain, and his head sent to Edward, who was at Conway.
Edward ordered that his gallant adversary’s body should be denied a Christian burial, and forwarded the head to London, where, crowned in mockery with ivy leaves, it was set in the pillory in Cheapside. Nor was that all: he succeeded in securing the person of David, had him tried for high treason, hanged, drawn, and quartered. Llewelyn’s daughter was forced to assume the veil. Thus ended the line of Cunedda, and Llewelyn is regarded as the last of the kings of Wales.
Edward was at Carnarvon when his second son Edward was born, 1301, and soon after he proclaimed him Prince of Wales.
It has been fondly supposed that this was a tactful and gracious act of the king to reconcile the Welsh to the English Crown. It was nothing of the kind. His object was to assure the Crown lands of Gwynedd to his son.
“Edward’s brutal treatment of the remains of Llewelyn, who, though a rebel according to the laws of the king’s nation, was slain in honourable war, and his utter want of magnanimity in dealing with David were long remembered among the Cymry, and helped to keep alive the hatred with which the Welsh-speaking people for several generations more regarded the English.”[1]