“Battle najera froissart” by 15th century Jean Froissart’s Chronicles (Bib. Nat. Fr., FR 2643, fol. 312v).. Licensed under Public Domain via Wikimedia Commons – https://commons.wikimedia.org/wiki/File:Battle_najera_froissart.jpg#/media/File:Battle_najera_froissart.jpg
The Spanish campaign of 1367 set the seal on the Black Prince’s reputation as a soldier of great skill and courage, but also marked the beginning of the end of the English in Aquitaine. Although the campaign was notable for the English victory at the battle of Nájera, it was on this campaign that the Prince became ill with dysentery and was never well again. He failed in all his objectives for the campaign, ending up poorer than when he started and having to tax his subjects in Aquitaine so much that they complained.
The Spanish campaign feels like an odd interlude in the Hundred Years’ War. In 1360 a peace treaty between England and France put a lot of soldiers on both sides out of work. No longer able to make a living from pillaging and ransoms, many of them joined together to form mercenary bands and roamed France terrorising towns and villages for protection money. Some even threatened the Pope at Avignon. These groups were a real problem for most of France, but less so for Aquitaine. The Black Prince is thought to have encouraged them in ravaging France.
The Castilians were the best sailors in Europe and had attacked the south coast of England in support of the king of France, since Don Pedro, the king of Castile, was allied to France. This made him a problem worth solving for Edward III. A peace treaty between the two was made in February 1363, but was not ratified by Don Pedro for another 18 months for fear of retribution from the French king.
Don Pedro had an illegitimate half-brother, Enrique de Trastámara (or Henry the Bastard or just the Spanish Bastard), who had led numerous rebellions against him. He was also fighting a war with the king of Aragón. Under the pretext of going south to fight the Moors, a large band of mercenaries entered Castile to fight for Enrique in late 1365. Edward III had to write to the English mercenaries among them to threaten reprisals against them and their families, since, under the treaty, no Englishman was supposed to bear arms against Don Pedro. Don Pedro had little support in Castile and fled, first to Portugal and then to Aquitaine, where he asked the Black Prince for help. Since Enrique was pro-French, Edward III had already decided to assist Don Pedro, and the Black Prince took an army to Castile in February 1367, crossing the Pyrenees at almost the worst time of the year. His allies in this endeavour were known as Pedro the Cruel and Charles the Bad (of Navarre), although these characteristics apparently came as a bit of a surprise to the Black Prince when he saw evidence of them.
As soon as they knew that the Black Prince was on his way most of the English mercenaries still with Enrique changed side rather than fight their former commander, or they had already been paid off by Enrique, depending on which version of the story you believe.
Initially Enrique followed the advice that he had received from the French king not to face the English in a pitched battle and contented himself with harrying the army when it arrived in Castile. This proved quite effective, but Enrique, like others before him, gave in to pride and decided to stand and fight at Nájera on 3rd April 1367. He was also worried that his army would desert him if he didn’t prove himself.
The English vanguard (the division at the front) of the army at the battle of Nájera was commanded by Sir John Chandos and it’s reasonable to assume that his herald was with him, for it’s this battle that forms the centrepiece of Chandos Herald’s Life of the Black Prince. The Prince himself commanded the main body of the army. Sir Hugh Calvely, one of the English mercenary captains who had originally fought for Enrique, was one of the commanders of the rearguard.
Enrique was supported mainly by French mercenaries under the command of Bertrand du Guesclin, later Constable of France. Enrique’s fears about the loyalty of his troops were well-founded and about half the Castilian army ran away. Enrique himself had to be forcibly removed from the field of battle so that he wouldn’t be killed.
The Black Prince was undefeated in battle and his reputation as a great commander was assured, but the rest of the Spanish campaign did not go as planned. Don Pedro was supposed to pay the Prince’s costs of bringing an army into Castile, but he prevaricated and, rather than return to Aquitaine as he had intended, the Prince had to stay in Castile and prod Don Pedro to collect the promised money. Don Pedro even executed prisoners, a valuable source of income through ransoms. This episode shows one of the main differences between the Prince and his ally. For the Prince ransoming (and trusting) his prisoners was a mainstay of chivalry, although it must have come as a shock to discover that one of his prisoners at Nájera was a man he’d released on parole (that is a promise not to fight against him again) after the battle of Poitiers. Don Pedro, on the other hand, believed that those who had fought against him were traitors and deserved to die.
The Prince soon realised that Don Pedro could not pay what he owed, but didn’t return to Aquitaine until August, by which time he was gravely ill. He lost a great deal of money going into Spain, as he had to pay the army himself. More damaging, for him and for England, his health was ruined and he never recovered from his Spanish adventure.