On the morning of Sunday September 18, king John, according to Froissart, sent some knights to reconnoitre the English position, which he proposed to attack at once. On hearing their report, the king, we are told, asked them in what way the attack should be made; and Eustace de Ribeaumont, their chief, advised the king to make all his men-at-arms dismount, except a few who were to charge and break the English archers. According to Baker of Swinbrook the advice was given by a Douglas, who had fought many times against the English, and affirmed that the English always dismounted their men-at-arms, ever since their defeat at Bannockburn. Whoever gave the advice, it was suicidal folly. A little learning is proverbially a dangerous thing; probably the most dangerous form which a little learning can assume is to know a fact, and to draw utterly baseless and absurd inferences from it. Edward II. was not routed at Bannockburn because his men-at-arms fought on horseback, but because they attacked in a confused and tumultuous manner on ground too narrow for their numbers. Edward III. did not win Crecy merely because his men-at-arms fought on foot, but because he had learned, alike from the victory of Falkirk and from the defeat of Bannockburn, how to combine the destroying force of archers with the defensive firmness of spearmen on foot. Moreover the difference between offensive and defensive tactics is fundamental. Horsemen obviously by dismounting lose most of their momentum for attack; as obviously, they cannot in any other way stand firm to sustain a charge. Want of numbers compelled the English, at Crecy and at Poitiers alike, to stand on the defensive: therefore, and therefore only, their men-at-arms abandoned their natural mode of fighting.
Reminiscences of Crecy may well have inclined king John to try whether some other tactics would not succeed better than the tumultuous rush of mailed horsemen straight on a front better protected than at Crecy: but the choice he made, whether inspired by sheer stupidity, or dictated by the insane class pride which refused to see in the plebeian archers the real victors over noble knights, was the worst possible. With his overwhelming numbers he could have surrounded the English; he could have kept them fully occupied in resisting attack while detaching a superior force to cut their retreat; he could have done anything he pleased. His defeat was even more crushing than his father's, and was all the more discreditable, in that it was due to his own deliberate orders, and not to the undisciplined rush of nobles too vain-glorious to obey.
Before the battle could begin, however, the cardinal of Perigord begged John to let him try to arrange terms with the Black Prince. There was some division on the subject in the French councils, some of the king's advisers thinking that the English could not escape destruction, and that therefore any concession was folly. The king ultimately consented, and the whole day was spent by the cardinal in going to and fro between the two camps. The accounts vary as to the exact course of these negotiations: very possibly several offers and counter offers were exchanged. The king, if he thought his enemies in his power, may reasonably have proposed very severe terms as the price of their lives; the prince was apparently ready to concede a good deal; but all the efforts of the cardinal were unavailing to bring about an agreement. Whatever the terms finally offered by the king of France may have been, they were such as the prince felt he could not honourably accept, while an appeal to the arbitrament of battle was still open. The delay enabled the English to improve their defences, probably by intrenching on their right flank and rear, which had been protected on their first taking up the position by a lager of waggons. It was injurious in another way, as they were very short of food; but this mattered little, as the morrow must bring victory or destruction.
Down to the morning of September 19, the day of the battle, every detail can be determined, if not with certainty, yet with reasonable probability. At this point, however, we encounter very serious difficulties. The two authorities which describe the battle minutely, Froissart and Baker, differ from one another in points too important to be called details, though they agree in representing the Black Prince as having remained in his position. The Chandos Herald, whose testimony is primâ facie deserving of the highest respect, affirms that the prince had in the night made up his mind to retreat, that he had sent off his vanguard to convey the baggage across the stream, and would have followed with his whole army, had not the French made haste to attack the rear-guard. The discrepancy is obviously fundamental;[29] one side or the other must start from a total misconception, and if so, it is hardly worth while to speculate as to what rags of truth may be left in the narrative.
The Black Prince's army was as usual divided into three parts, under the earl of Warwick, the prince himself, and the earl of Salisbury. The numbers are disputed, the French being naturally inclined to raise the total, the English to diminish it. The authorities on the English side agree in giving about 8000, and they obviously would have the best means of knowing. A real element of uncertainty is, however, always present, in the doubt whether the attendants on the knights are to be added, or are meant to be included in the number given of other soldiers besides the men-at-arms and archers. Probably it would be safe to affirm that the number did not exceed 10,000 of all arms. Having to fight a defensive action against very superior forces, the prince necessarily resorted to tactics much like those of Crecy. The earl of Warwick's division, comprising comparatively a large proportion of archers, lined the hedge in front. Salisbury's men-at-arms, dismounted, were drawn up in line, a stone's-throw back from the gap in the hedge, with archers on their flanks, who would naturally be thrown forwards. The prince's own "battle" he moved[30] up on to a gentle eminence on one flank; this was at the spot marked Bernon on the map, and on the left flank, assuming Colonel Babinet to be right in his identification of the position. From this point he returned after the battle had begun, to sustain Warwick and Salisbury, except that he throughout kept some hundreds of men-at-arms mounted, in reserve.
The numbers on the French side are stated with much greater discrepancy than on the English. Froissart gives no less than 60,000, but there seems reason to believe that the real amount was about 40,000, or fully four times the Black Prince's total. A picked body of 500 horsemen, under the two marshals Audrehen and Clermont, was to lead the attack. This was followed by the first of the main "battles" under the duke of Normandy, John's eldest son. The second was commanded by his brother the duke of Orleans, the third by the king in person; both of these remained apparently at some distance. As the marshals advanced up the funnel-shaped opening leading to the gap, which was itself only wide enough for four horsemen abreast, the archers, protected by the hedge, poured in volleys of arrows. Thanks to their armour, the French were not all shot down, and engaged in a hand-to-hand conflict with Salisbury's men, ranked beyond the gap. The first French line, as they followed, engaged with Warwick's troops along the whole line of the hedge.
Seeing that many arrows were broken on the stout armour, or glanced from it, the earl of Oxford bade the archers, who were closing round the flank and rear of the mounted force, aim at the horses, which were less protected. In this way the horsemen were soon routed; one marshal was killed, the other taken prisoner, their immediate command was nearly destroyed, and the whole first line was driven back in confusion. The temptation to pursue must have been strong: but the English leaders knew that their work was only begun. They reformed their ranks, and awaited a fresh attack, which was not long in coming. The French second line under the duke of Orleans advanced in its turn, and after a similar struggle was repulsed even more completely. Still the English commanders would not allow pursuit, though Sir Maurice Berkeley[31] charged on his own private account into the retreating mass, and was, as might be expected, taken prisoner, desperately wounded, after performing prodigies of valour. The breathing time was spent in carrying back the wounded into safety behind the hedges, and in gathering as many arrows as possible, for the stock was running short. It speaks volumes for the deadliness of the shooting at that short range, that the chronicler speaks of the archers drawing the arrows out of the bodies of the dead and wounded, not picking them up from the ground. The French king, on hearing that his son had been beaten back, swore solemnly that he would not leave the field that day, unless dead or a prisoner, and led on the third line. The English, all of whom, except the prince's small reserve, had now been fighting for hours against heavy odds, were nearly worn out; a great many had been wounded, and the numbers left seemed too small to withstand another onset. At this juncture some dismay was caused by the Captal de Buch, a Gascon noble who won a great reputation in the latter part of the war, riding off the field followed by a handful of men-at-arms and a hundred archers. It was naturally imagined that he was flying or deserting: instead of this, he had obtained the prince's permission to make a bold stroke for victory, by circling round the French flank and attacking them in their left rear. This third conflict was the severest of all, the more so as the archers, their arrows being exhausted, had to resort to their bills. At length the Captal de Buch was seen emerging from beyond the slightly rising ground which had masked his movements from the French, displaying the red cross of St. George as a signal: thereupon the Black Prince charged with his reserve of mounted men-at-arms. The day was finally won: though the king of France fought on desperately for awhile, showing himself as good soldier as he was bad general, he was at length obliged to surrender himself prisoner.
A long list of nobles and knights interred in the churches of Poitiers, another long list of distinguished captives, mark the overwhelming nature of the defeat which the French had sustained. So great was the number of prisoners that the Black Prince released a very large part, on their undertaking to pay their ransom at Bordeaux. The English loss must have been severe, relatively to the force engaged, though no authoritative figures can be given. The French of course lost much more heavily; but the mere number of slain was as nothing compared to the crushing effect of the unexpected blow. Had there been any spirit of resistance left in the French, the Black Prince could hardly have reached Bordeaux in safety. The relics of the army defeated at Poitiers must have amounted to several times his diminished force: yet he carried off his noble prisoners, with all the spoil of the royal camp and of his previous raid, without a trace of opposition.
It would almost seem as if Edward III. and his son never seriously contemplated the subjugation of France: for instead of attempting to take advantage of the virtual dissolution of all government resulting from the defeat of Poitiers and the king's capture, the Black Prince returned to England with his prisoner. The treaty of Bretigny, by which Edward resigned his claims to the French crown, and the French king abandoned all suzerainty over the south-west, was a reasonable solution of the difficulty, if nothing had been at stake but the personal pretensions of the two monarchs. But the national feelings of the French were too strongly roused: the treaty was never carried out. John's son and successor Charles V., or rather his military adviser the Constable Duguesclin, learned wisdom from the crushing defeats of Crecy and Poitiers, and steadily abstained from confronting English armies in the field. All the arts of minor warfare, raids, surprise of castles, cutting off of small parties, were adopted against the English, and the success though slow was steady, and was twofold. Outnumbered from the nature of the case, the English could not but lose in a war thus carried on; and the French subjects of the Black Prince were alienated, through being exposed both to injury at the hands of their own countrymen, and to heavy demands on their resources made by the prince to help him fight a losing game. Gradually things went more and more against the English, until by the time the Black Prince's health failed, and he went home to die, little was left beyond a few towns, which were bound to England by commercial ties. Nor was this all; in the second active stage of the great war, when Henry V. was formally accepted as heir to the French crown, the south-west was the region in which the cause of the Dauphin, the national cause, was most steadily supported.