Edward the Black Prince as their lord, but the murder of Jacob van Artevelde put an end to this project. Both in September and in the following April the prince was called on to furnish troops from his principality and earldom for the impending campaign in France, and as he incurred heavy debts in the king's service his father authorised him to make his will, and provided that in case he fell in the war his executors should have all his revenue for a year. Edward, Prince of Wales sailed with King Edward III on 11 July 1346, and as soon as he landed
Edward the Black Prince (in the Pyrenees) to Pamplona (the capital of Kingdom of Navarre). When Calveley and other English and Gascon leaders of free companies found that the Black Prince was about to fight for Peter, they withdrew from the service of Henry of Trastámara, and joined the Black Prince "because he was their natural lord". While the prince was at Pamplona he received a letter of defiance from Henry. From Pamplona the prince marched by Arruiz to Salvatierra, which opened its gates to his army, and thence advanced to Vitoria, intending to march on Burgos by this direct route. A body of