In spite of the agreement which the English had made with the King of Navarre, they were still afraid of him, for they heard that he had again begun to treat with Henry of Trastamare. The Black Prince ordered two of the frontier towns of Navarre to be invested with English troops, and compelled the King of Navarre to accompany the army until it had safely passed through his dominions. They crossed the Pyrenees by the pass of Roncesvalles. The passage through these narrow defiles was most dangerous and difficult, as it was now the middle of winter. The entire army was almost overwhelmed by a frightful snow-storm, which overtook them in the mountains. They suffered great loss both in men and beasts, but at last reached the valley of Pampeluna, where they stopped to recruit their forces. Whilst they were waiting there, the King of Navarre, as he was riding about, was taken prisoner by a French captain. He was supposed to have purposely allowed this to happen, that he might be freed from all further personal responsibility as to the war. One of his knights however conducted the Prince through the kingdom of Navarre, and provided guides for the army through the difficult mountain roads. The army crossed the deep and rapid Ebro by the bridge at Logrono, and encamped near the little town of Navarette. Don Henry and Du Guesclin were not far off, encamped near Najera on the little river Najerilla.
From Navarette the Black Prince sent his manifesto to Don Henry. In this he stated that he had come to restore the legitimate king to his throne, and expressed his amazement that Henry, who had sworn allegiance to his brother, should have ventured afterwards to take up arms against him, and drive him from his rightful throne. He called God and St. George to witness that he was willing even now to settle the dispute by mediation; but if that were refused, there was nothing left for it but to fight. Henry answered on the following day. He said that the whole kingdom had fallen away from Don Pedro, and attached themselves to him; that it was heaven's doing, and no one had a right to interfere. He also, in God's name and St. Iago's, had no desire for a battle; but he forbade the enemy to press any further into his country.
On their march to Logrono, the Prince's army had suffered much from want of provisions; he was therefore eager for a battle as soon as possible; but the enemy waited to attack till all their troops should have arrived. Sir William Felton went with a body of men to reconnoitre the enemy, but was attacked by a large number of French and Spaniards, and was slain, after a most valiant fight. Sir Hugh Calverly, another of the bravest English knights, was also surprised and slain by a large body of Spaniards, who had gone out under Don Tello, Henry's brother, to reconnoitre the English army.
These successes filled the Spaniards with joy and confidence. Henry said to his brother, "I will reward you handsomely for this; and I feel that all the rest of our enemies must at last come to this pass." But on this one of the French knights spoke up, and bade him not be too confident; for with the Black Prince was the flower of chivalry of the whole world, all hardy and tough combatants, who would die rather than think of flying. "But," he added, "if you follow my advice, you can take them all without striking a blow." He then advised Henry simply to keep watch over all the passes and defiles, so that no provisions could be brought to the English army, and when famine had done its work, to attack them as they retreated. This advice was very sound, and would doubtless have been successful if it had been followed; but Henry was far too impetuous a knight to be content to pursue a policy of inaction. He crossed the little river Najerilla with his army, and spread out his forces in a beautiful open plain, which was broken neither by tree nor bush for a great distance. The army was divided into three battalions, and their front was covered by men who threw stones with slings. When all were formed in order, Henry mounted a handsome mule and rode through the ranks, exhorting and encouraging the men.
The Black Prince meanwhile was not very far off. The previous night he had been encamped at a distance of only two leagues from the enemy, and was now marching to meet him in full battle array. He crossed a hill to reach the plain where Henry's army lay, and advanced down a long, deep valley. The sun was just rising when the two armies came in sight of one another, and it was a beautiful sight, says Froissart, to see the battalions as they advanced to meet, their brilliant armour glittering in the sunbeams.
The Prince mounted a hill, that he might see the Spaniards; and after observing them, ordered his army to halt, and spread out in line of battle. Immediately before the battle he raised Sir John Chandos to the rank of a knight banneret, to the great joy of those knights and squires who fought under Sir John.
Then the Prince spoke a few words to the army. "To-day, sirs," he said, "has, as you well know, no other termination but in famine. For want of food we are well-nigh taken. See, there are our enemies, who have food enough—bread and wine, and fish, salt and fresh, from the river and the sea. These we must now obtain by dint of lance and sword. Now let us do such a day's work that we may part from our foes with honour." Then he knelt down, and prayed, "O very Sovereign Father, who hast made and fashioned us, so truly as Thou knowest that I am not come hither but to defend the right, for prowess and for liberty, that my heart leaps and burns to obtain a life of honour, I pray Thee that on this day Thou wilt guard me and my people." After which he rose, and exclaimed, "Advance, banners; God defend the right." Then, turning to Don Pedro, he took him by the hand, and said, "Certainly, sir King, to-day you shall know if ever you shall recover Castile; have firm trust in God."
Then the battle began. The first battalion of the English army, commanded by John of Gaunt and Chandos, engaged the French contingent of the Spanish army, commanded by Du Guesclin. John of Gaunt encouraged his men, shouting, "Advance, banners, advance! let us take God to our rescue, and each to his honour." Meanwhile the Prince, near whom rode Don Pedro, attacked the second division of the Spanish army, commanded by Don Tello. At the first encounter the Spanish troops were seized with terror, and fled in wild confusion, so that the Prince was at liberty to engage the main body of the enemy, commanded by Henry. Here the Spaniards, encouraged by the presence of their king, fought with much greater bravery. The stones, thrown with great force from the slings of the Spanish foot soldiers, did much harm to their opponents, and many were unhorsed by them; but the English arrows "flew straighter than rain in winter time," and the Spanish cavalry began to break before them.
Thrice Henry rallied his men; but at last it was hopeless, and he was obliged to fly. Du Guesclin and his French soldiers also gave the Dukes of Lancaster and Chandos plenty to do. Chandos was unhorsed, and only saved his life by his great coolness and presence of mind. The French knights bore themselves most valiantly. Du Guesclin, who would never fly, even though he saw the day was lost, was surrounded and taken prisoner.
The Spaniards and French fled across the river to the town of Najara. Many were killed in crossing the bridge; so that the river was dyed red with the blood of men and horses. The English and Gascons entered the town with them, and took many of the knights, and killed many of the people. In Henry's lodgings they found much plate and jewels; for he had come there with great splendour.