raid on the castle of Montmuran on 10 April, to capture Arnoul d'Audrehem, Marshal of France, who was a guest of the lady of Tinteniac. Bertrand du Guesclin, in one of the early highlights of his career, anticipated the attack, posting archers as sentries. When the sentries raised the alarm at Calveley's approach, both du Guesclin and d'Audrehem hurried to intercept. In the ensuing fight, Calveley was unhorsed by a knight named Enguerrand d'Hesdin, captured, and later ransomed. In 1359 Sir Robert Knolles and Calveley invaded the Rhône Valley. The city of Le Puy fell to them in July. The campaign ended when their way to Avignon was barred by the army of Thomas de la Marche, Deputy for Louis II, Duke of Bourbon, at which point both English commanders retreated. At the Battle of Auray on 29 September 1364, Calveley had the command of the reserve division of the forces of Jean de Montfort, under the command of Sir John Chandos. Charles de Blois was killed at Auray, enabling Jean de Montfort to claim the Duchy without further conflict. The Iberian Campaigns After the conclusion of the Breton civil war, Calveley, along with many other soldiers, found himself unemployed. These soldiers, banding together in the Free Companies, continued to support themselves by raiding widely, causing a huge problem for the Kingdom of France. The solution to the problem was found when Aragon, France and the Papacy agreed to provide money to pay for the Free Companies to wage a campaign to support Count Enrique of Trastamara's bid for the throne of Castile, which at the time was held by Enrique's half-brother, Pedro of Castile. Calveley signed up as the most prominent of the English captains on this campaign, in which he was involved from 1365 to 1367, ironically serving alongside Bertrand du Guesclin, his once and future enemy. For his services to Enrique, he was made Count of Carrion. He married one of the Aragonese queen's ladies-in-waiting, named Constanza, daughter of a Sicilian baron. Pedro the Cruel, having fled from Castile, invoked his alliance with England. Calveley was ordered back to the service of England by the Black Prince, and now took a prominent part in Pedro's counter-campaign, culminating in the decisive Battle of Nájera. At Nájera, Calveley was once again in the rearguard, sharing command with Count Jean I of Armagnac. The two commanders had the glory of