There is no known response of Edward III to the pestilence time. He no doubt regarded it simply as a threat to the supply of soldiers for his army. All his thoughts were of war. An armistice was agreed after the fall of Calais that endured for six years before foundering on claims of bad faith. The king combined in warfare against the French with his eldest son, Edward of Woodstock, prince of Wales. The young man would also become known as the Black Prince, on account of his armour rather than his morals or disposition. Edward of Woodstock embarked upon what was effectively a reign of terror by which contingents of his army were despatched to ravage selected bands of French territory; ordered to pillage, burn or destroy whatever lay in their path, they were dedicated to wiping out the lives and the livelihoods of the people of France. They had not been summoned in a feudal call to arms; they were either forcibly conscripted or they were mercenaries paid by the day. Many of them were common thieves or murderers attracted to the prospects of spoil. In this pursuit they were eminently successful. The folk memory of English raids lived in the French national consciousness for many hundreds of years. Edward of Woodstock boasted that, in the space of seven weeks, he had laid waste 500 cities, towns and villages in the region of Bordeaux that had never known warfare in its history. It was a policy that had already been successfully deployed in Scotland.
The strategy of the French seems to have been to refrain from open confrontation but, in the autumn of 1356, the two armies came into contact; a French reconnaissance party stumbled upon the forces of the English. Battle could not be honourably delayed. The new king of France, John II, held a vast superiority in numbers with an army of 35,000 against the Black Prince’s 7,000; but his position, at Poitiers, was on rising ground covered with hedges and vineyards.
The location itself was not the principal difficulty. The English could always now claim the mastery of the field by the use of the longbow, and the Black Prince followed his father’s tactics at Crécy by using the archers as the main fighting force. The French cavalry were flung against the English line, only to be cut to pieces by a hail of arrows; the rest of the French knights then followed on foot, but they were also repulsed by the bows of yew. The average length of the bow was 6 feet (1.9 metres), and the arrows were 3 feet (0.91 metre) in length. The archer drew it to the ear, rather than to the chest, and with that momentum he could send it 250 yards (228 metres); he fired ten volleys each minute. This was a new age of warfare.
The French lines broke and dissolved; a retreat, and a general panic, ensued. In the confusion the French king and his son were captured by the English forces. It was a fresh calamity for the native army. King John was escorted to England by the Black Prince, and a truce of two years was agreed. When John was taken through the streets of London, it became a festive occasion for the citizens as the captive king was led in triumph to Westminster Hall where Edward III was waiting to greet him. It was a thoroughly medieval form of captivity. He was released on the surety of his son but, when his son escaped from England, he voluntarily returned to resume his life as a prisoner. He could not endure the dishonour of violating the terms of the agreement. Four months after his return to London, he died of an unknown disease. The king’s body was then sent back to France.
Edward resumed hostilities after the time of truce, but a campaign in the winter of 1359 did not supply the overwhelming victory for which he had prayed. He was, however, still in the ascendant. So in 1360 a treaty was reached in which Edward agreed to renounce his claim to the French throne in return for full sovereignty over Gascony, Calais, Guienne, Poitou and Ponthieu in northern France.