Thus were England and France once more plunged into war through the ill-timed restoration of a base tyrant; with general discontent in the English provinces in the south of France, and the health of the prince fast failing. The French king had carefully calculated the declining vigour of Edward III., as well as the health of his son; and now he advanced to regain the territories he had lost, and to avenge the mortal injuries which his country had suffered from the English. Circumstances were highly favourable to Charles. Discontent prevailed in the English provinces, and there was disunion amongst the commanders of the forces. On his own side he had with him the wishes of the whole country. Many of the great commanders who had assisted to win the proud laurels of Edward and the Black Prince were dead, or sunk into old age. The Free Companies who had served under the Black Prince were dismissed from the want of that very pay which the tyrant Pedro had refused, and were now eagerly engaged by the French king. The feudal troops and the archery of England, the very soul of the army, had returned home at the end of the war, and it would now require much time and expenditure of money to collect them again.

On the other hand, a new generation had sprung up in France, who had not known the terrors of Creçy or Poitiers, but only had heard of the defeat of France and the death of their fathers, and burned to avenge them. The terrible King of England was old; his lion-hearted son was known to be sinking into the grave. It seemed as if the doom of heaven was pronounced on the power of the English. They had overrun and destroyed, but taken no pains to conciliate, and the hatred which flamed in the hearts of the people was fanned and made holy by the universal voice of the clergy, producing everywhere revolt from the English, and adhesion to the French monarch. Charles had prepared for this crisis for years, husbanding his income till he was called not only the Wise, but the Wealthy; and the people, now kindled with the spirit of patriotism, submitted cheerfully to new taxes for reconquering the independence of their country, even to that same feuage which, imposed in Gascony, had cost the Prince of Wales his popularity; so much does the payment of a tax depend on the person who imposes it, and the purpose for which it is demanded.

Still the Black Prince, though ill, was not cast down. Some of the Free Companies, in spite of the defection of their fellows, joined him to the number of 6,000 lances, under the brave Sir Hugh Calverley; and Edward III. sent from England a considerable army, under the command of the Earl of Cambridge, the prince's fourth brother, and Sir John Hastings, the Earl of Pembroke, his brother-in-law.

The King of France fell on the province of Ponthieu, which gave the English admittance into the heart of France. The people everywhere received him with open arms, showing how completely all the efforts of England to conquer France had been thrown away. The citizens of Abbeville opened their gates to him. Those of the neighbouring towns followed their example, and in a very little time the whole country was regained by the French.

In Poitou the brothers of Charles, the Dukes of Berri and Anjou, assisted by the gallant Du Guesclin, were equally successful. Lord Audley, the son of that Sir James Audley who distinguished himself so greatly at the battle of Poitiers, who was seneschal of the province, fell sick and died in the very commencement of the war, to the extreme grief of the prince, who made the celebrated Sir John Chandos his successor. But jealousies amongst the commanders, now the Prince of Wales was unable to be at the head of his armies, produced disastrous consequences, and worse very soon followed in the death of the brave Chandos. That enterprising leader proposed to the Earl of Pembroke to join him in an expedition against Louis de Sancerre, the Marshal of France. But Pembroke, jealous of the fame of Sir John, and instigated by his flatterers, who insinuated that with such a renowned general the earl would come off with very little of the glory of the undertaking, declined the proposal. Sir John Chandos, disgusted by the refusal, retired into the city of Poitiers, and dismissed such troops as were not necessary for its defence.

No sooner had he done this, than the Earl of Pembroke issued forth with 200 spears to win distinction for himself, and waste the lands of the nobles who were opposed to the Black Prince's taxation. This was good news for the Marshal Sancerre, who had little fear when he learned that Chandos had retired in displeasure. He came suddenly with an overwhelming force on Pembroke, killed a considerable number of his knights, and compelled him to take refuge in an old church of the abolished Knights Templars. Pembroke, now awake to his folly, dispatched a messenger to Sir John Chandos for help. The messenger did not reach Poitiers till the next morning, when Sir John was at breakfast. On hearing Pembroke's appeal, he coolly went to mass, glad, no doubt, to let the envious nobleman feel the effects of his foolish conduct. Meantime the battle at the church was going on vigorously, the English stoutly defending their retreat, but feeling, from the thinness of the walls and want of provisions, that they could not hold out long. Another messenger was dispatched to Sir John, accompanied by a most earnest entreaty, and a valuable ring from the finger of the earl himself. Sir John was at dinner when the messenger arrived, describing in earnest words the imminent danger of the earl and his followers. Sir John had not yet forgiven the young nobleman. He went on with his dinner, saying, "If it be as you say, nothing can save him." But anon, lifting up his head, he said to his knights and esquires around him, "Hear me, sirs! the Earl of Pembroke is a noble person, and of high lineage, son-in-law to our natural lord, the King of England. Foul shame were it to see him lost, if we can save him. I will go, by the grace of God."

Two hundred men-at-arms mounted in haste, and, Sir John at their head, galloped off to surprise the Marshal of Sancerre while besieging Pembroke in the Temple-house. But the wary French, apprised of the approach of Sir John, speedily drew off and escaped.

In December of the same year, 1370, Sir John Chandos lost his life in a confused skirmish, owing to want of proper co-operation among the English commanders; and his loss was soon obvious in a greater lack of spirit and success in the English army in the south of France; the gallant Captal de Buch, who preceded Sir John as seneschal of Guienne, being taken prisoner, and lost to the English service.

Meantime Edward III. had sent fresh forces to Calais, under his son, the Duke of Lancaster, commonly called John of Ghent, or Gaunt, in alliance with the Count of Namur. The King of France sent a still larger army to oppose the inroads of these forces under his brother Philip, the Duke of Burgundy, but commanded him on no account to come to a general engagement with the English, lest the fate of Creçy and Poitiers should once more overtake him. The duke posted himself between St. Omer and Tournay, where the Duke of Lancaster came out against him, but could not induce the French to fight. The Duke of Burgundy, impatient of this inglorious position, desired to be recalled, and the king ordered him to fall back on Paris. Then John of Gaunt advanced, pillaging and laying waste the country in the old English manner from Calais to Bordeaux, while Sir Robert Knowles, the Free Companies' leader, with an army of 30,000 men, took his way by Terouenne and through Artois, burning and destroying all before him. He next advanced to the very gates of Paris, up to which one of his knights rode, and struck a blow with his spear, having made a vow that he would strike his lance on the gate of Paris. The daring warrior, however, lost his life returning through the suburbs, being cut down by a gigantic butcher with his cleaver. After that Knowles marched into Brittany for winter quarters. On their march that fatal disunion which now infected the English army, once more showed itself. Lord Grandison, Lord Fitzwalter, and other English nobles, refused to follow Knowles into Brittany. They declared that it did not become noblemen like themselves to serve under a man of mean birth, as Sir Robert Knowles was, and they drew off their forces to Anjou and Touraine.

Bertrand du Guesclin, now made Constable of France, hearing of this disunion from an English traitor, pursued Knowles to cut him off. Knowles sent information of this pursuit to Lord Grandison, and his disdainful aristocratic companions; but too late, for Du Guesclin overtook them at Pont Volant, defeated them, and slew the greater part of these proud exclusives. Knowles made good his retreat into Brittany.