After having spent six days at Alicante and seeing that the Aragonese fleet was not going to appear, the King of Castile left and headed back to Cartagena. There, the Admiral of Portugal told the king that his liege lord, the King of Portugal, had ordered him to attend with his ten galleys for three months, going wherever he sent him. As the three months were now up, he dared stay no longer and would not disobey his liege lord's command. The King of Castile was greatly troubled when he heard this, because he did not want the admiral to leave so suddenly, but he gave him permission to leave as he could not keep him there.

When the Portuguese galleys left, the king decided to leave the fleet and go overland to Castile. He sent all the galleys to Seville, allowed the naos to depart and headed for Tordesillas where Doña María de Padilla, the mother of his children, was staying. When the Aragonese galleys found out that the King of Castile had disbanded his fleet, they did the same to thirty galleys, leaving ten to patrol the sea and attack any Portuguese or Castilian ships. Indeed, they attacked a number of ships but only small vessels.

Around this time in the month of September, Count Enrique, Don Tello his brother and a number of nobles and knights of Aragon (up to 800 horsemen) entered Castile by way of Ágreda. Don Fernando [Ruiz] de Castro, Juan Fernández de Henestrosa and others who were at the frontier bordering on the Almazán district came out to meet them with around 1,500 horsemen.

It came about that they fought a battle near Moncayo, and Don Fernando de Castro was defeated. Juan Fernández de Henestrosa was killed, as were other fine nobles, and, along with others, Íñigo López de Orozco was taken prisoner. This distressed King Pedro a great deal, and his enemies gained much encouragement from it.

That year the King of Castile ordered the deaths in Carmona (where they were prisoners) of his brothers Don Juan and Don Pedro, who were the sons of his father King Alfonso and Leonor Núñez de Guzmán.