Minsterworth was not the only traitor. In the earlier part of the war, there had fought on the English side a grand-nephew of the last independent Prince of Wales, Sir Owen ap Thomas ap Rhodri,[1] whose grandfather, Rhodri or Roderick, the youngest brother of the princes Llewelyn and David, had after the ruin of his house lived obscurely as a small Cheshire and Gloucestershire landlord. In 1365 Owen was in France, engaged, no doubt, in one of the free companies, and on his father's death he returned to defend his inheritance from the claims of the Charltons of Powys. Having succeeded in this, he returned to France, and nothing more is heard of him until after the renewal of the war. In 1370 he appeared as a strenuous partisan of the French. Mindful of his ancestry he posed as the lawful Prince of Wales, and established communications with his countrymen, both in France and in Wales. Anxious to stir up discord in Edward's realm, the French king gladly upheld his claims. A gallant knight and an impulsive, energetic partisan, Sir Owen of Wales soon won a place of his own in the history of his time. In Gwynedd he was celebrated as Owain Lawgoch, Owen of the Red Hand. Conspiracies in his favour were ruthlessly stamped out, and a halo of legend and poetry soon encircled his name. In France Charles entrusted him and another Welshman, named John Wynn, with the equipment of a fleet at Rouen with which the champion was to descend on the principality and excite arising. Bad weather caused the complete destruction of the expedition of the Welsh pretender. Two years later, however, another fleet was fitted out on his behalf, and in June, 1372, Owen took possession of Guernsey.

[1] The place of Owen of Wales in history was for the first time clearly shown by Mr. Edward Owen in Y Cymmrodor, 1899-1900, pp. 1-105.

At that time the fortune of war was strongly in favour of France, though the initial successes of Charles V. were damped by the doubtful results of the petty struggles which filled the year 1371. During that year Du Guesclin, the soul of the French attack, ejected the English from many places in Normandy and Poitou. On the other hand, the English won the hard fought battle over a Flemish fleet in Bourgneuf Bay, which has already been mentioned. They also showed some power of recovery in Aquitaine, where their recapture of Figeac in upper Quercy gave them a base for renewing their attacks on Rouergue. On the whole then, the year left matters much as they had been.

The occupation of Guernsey by Owen of Wales was the beginning of a new series of French victories. Up to that time the northern coastlands of Aquitaine, lower Poitou, Saintonge, and Angoumois had remained almost entirely under their English lords. In the hope of resisting attack, the English projected the invasion of France both from Calais and from Guienne. To carry out the latter plan John Hastings, Earl of Pembroke, was despatched with a fleet and army from England, with a commission to succeed John of Gaunt as the king's lieutenant in Aquitaine. The Franco-Spanish alliance then began to bear its fruits. Henry of Trastamara equipped a strong Spanish fleet to meet the invaders in the Bay of Biscay. On June 23, 1372, the two fleets fought an action off La Rochelle. The light Spanish galleys out-manoeuvred the heavy English ships, laden deep in the water with stores and filled with troops and horses. The Spaniards set on fire some of the English transports, which became unmanageable owing to the fright of the horses embarked upon them. The English fought valiantly, and night fell before the battle was decided. Next day, the Spaniards attacked again, and won a complete victory. The English fleet was destroyed, and Pembroke was taken a prisoner to Santander.

The news of Pembroke's defeat encouraged the French to attempt the conquest of Poitou. Du Guesclin invaded the county from the north in co-operation with the Spaniards at sea, Owen of Wales abandoned the siege of Cornet castle, in Guernsey, which still held out against him, and hurried to join the Spaniards. At Santander he met the captive Pembroke, and bitterly reproached the marcher earl with the part his house had taken in driving the Welsh from their lands. In August Owen and the Spaniards were lying off La Rochelle. Sir Thomas Percy, seneschal of Poitou, and the Captal de Buch were with a considerable force at Soubise, near the mouth of the Charente. Owen ascended the river and fell unexpectedly on the English at night. The English were utterly defeated and both leaders were taken prisoners, Thomas Percy, the future ally of Owen Glendower, being captured by one of Sir Owen's Welsh followers. Meanwhile, Du Guesclin, after receiving the surrender of Poitiers on August 7, pressed forward to the coast and was soon in touch with Owen and the Spaniards. On the same September day Angoulême and La Rochelle opened their gates to the French. In the course of the same month all the other towns of the district declared for the winning side. The nobles of Poitou were still to some extent English in sympathy, and a considerable band of them and their followers took refuge in Thouars. On December 1 this last stronghold of Poitevin feudalism surrendered. The tidings of disaster roused the old English king to his final martial effort. A fleet was raised and sailed from Sandwich, having on board the king, the Prince of Wales, the Duke of Lancaster, and many other magnates. Contrary winds kept the vessels near the English coast, and the vast sums lavished on the equipment of the expedition were wasted. In despair the Black Prince surrendered to his father his principality of Aquitaine. When the king begged the commons for a further war subsidy, he was told that the navy had been ruined by his harsh impressment of seamen, and his refusal to give them pay when detained in port waiting for orders. When the command of the sea passed to the French and their Spanish allies, all hope of retaining Aquitaine was lost.

The final stages in the ruin of the English power in France need not detain us long. Despite his successes, Du Guesclin persevered in his policy of wearing down the English by delays and by avoiding pitched battles. He turned his attention to Brittany, where Duke John, in difficulties with his subjects, had invoked the aid of an English army. Thereupon the Breton barons called the French king to take possession of the duchy, whose lord was betraying it to the foreigner. The old party struggle was at an end: Celtic Brittany joined hands with French Brittany. Before the end of 1373, Duke John was a fugitive, and only a few castles with English garrisons upheld his cause. Of these Brest was the most important, and despite the Spaniards and Owen of Wales, the English were still strong enough at sea to retain possession of the place.

In July, 1373, John of Gaunt marched out of Calais with one of the strongest armies with which an English invader had ever entered France. Pursuing a general south-easterly direction, the English pitilessly devastated Artois, Picardy, and Champagne. Du Guesclin hastened back from Brittany to command the army engaged in watching Lancaster. He still continued his defensive tactics, but gave the enemy little rest. Lancaster was no match for so able a general as the Breton constable. At the end of September he moved from Troyes to Sens, and thence pushed into Burgundy. Then he turned westwards through the Nivernais and the Bourbonnais, and led his army through the uplands of Auvergne. By the end of the year he had traversed the Limousin, and made his way to Bordeaux. Half his army had perished of hunger, cold, and in petty warfare. The horses had suffered worse than the men, and the baggage train was almost destroyed. Without fighting a battle Du Guesclin had put the enemy out of action. Experience now showed how useless were the prolonged plundering raids which ten years before had filled all France with terror.

Even in Gascony Lancaster could not hold his own. After declining battle with the Duke of Anjou, he returned to England, leaving Sir Thomas Felton as seneschal. The enemy had penetrated to the very heart of the old English district. La Réole opened its gates to them; Saint-Sever, the seat of the Gascon high court, followed its example, By 1374 the English duchy was reduced to the coast lands around Bayonne and Bordeaux. That year the French laid siege to Chandos's castle of Saint-Sauveur-le-Vicomte. The siege was as long and as elaborately organised as the great siege of Calais. A ring of bastilles was erected round the doomed town, and cannon discharged huge balls of stone against its ramparts. After nearly a year's siege the garrison agreed to surrender on condition of a heavy payment. With the fall of the old home of the Harcourts the English power in Normandy perished. There was still, it is true, the influence of Charles of Navarre; but that desperate intriguer had compromised himself so much with both parties that no confidence could be placed in him.

The misfortunes of the English inclined them to listen to proposals of peace. Though the papacy was more frankly on the French side than ever, it had not lost its ancient solicitude to put an end to the war. With that object Gregory XI, though eager to return to Rome, tarried in the Rhone valley. Two of his legates appeared in Champagne at the time of John of Gaunt's abortive expedition. From that moment offers of peace were constantly pressed on both sides. Lancaster was at Calais, and Anjou was not far off at Saint-Omer, when definite proposals were exchanged. Before long it was found more convenient that the envoys should meet face to face, and for this reason the two dukes accepted the hospitality of Louis de Male, and held personal interviews at Bruges. More than once the negotiations broke down altogether. At no time was there much hope of a permanent peace. The English insisted on the terms of 1360, and the French demanded the cession of Calais and the release of the unpaid ransom of King John. However, on June 27, 1375, a truce for a year was signed at Bruges, which was further extended until June, 1377, just long enough to allow the old king to end his days in peace. France had once more to wrestle with the companies set free by the truce, so that England could still enjoy possession of Calais, Bordeaux, Bayonne, Brest, and the other scanty remnants of the cessions of the treaty of Calais. Satisfied at putting an end to the war, Gregory XI betook himself to Rome. Thus the truce outlasted the Babylonish captivity of the papacy as well as the life of Edward III.