Alfonso X won the castle through the Peace Signed with King Muhammad II in 1281. In 1462, after the truces of Henry IV, the Constable D. Lucas de Iranzo granted the Moors of Granada, with 600 horsemen and 2000 pawns attacked the castle of Campillo de Arenas on April 20, 1462. The combat was very intense and of five doors that the castle had, two were burned by the Christians. However, it was not conquered. The Constable sent 30 knights from Jaén to prepare an ambush for the Campillo de Arenas garrison. They were served as a spy by a renegade Moor who was the nephew of the Warden of Campillo de Arenas. The ambush was unsuccessful and after a slight skirmish the Christians returned to Jaén. In 1463, the Constable sent 40 pawns under the command of Juan Navarrete, against the castle of Campillo. The Christians took two prisoners for whom it was learned that the garrison was made up of 33 Moors. Constable Iranzo sent 30 soldiers to try to seize Campillo, which was not carried out because "... they failed to be safe". In 1471 , the king of Granada, upon learning of a Christian project to attack Campillo, sent to his defenders "sufficiency of a group of people." In Constable Iranzo's letter to the then Pope Sixtus IV, on the plight of Jaén in the face of the thrust of the Moors are cited as being of great danger for Christians to the castle of Campillo de Arenas.Other news about our castle are given by the following chroniclers:
Argote de Molina in his "Nobility of Andalusia" (1588), cites as Warden of the Castle of Campillo de Arenas Mr. Francisco Fonseca.
Ximena Jurado in his "Ecclesiastical Annals" (1654), qualifies the Castle of Campillo as "A strong castle on the Puerta de Arenas". Espinalt in "Spanish Atlante" (1787), says the following about the Castle of Campillo de Arenas: "To the west of this town half a league away, there remains a strong castle somewhat ruined, from immemorial time, as well as the Puerta de Arenas held by two high rocks that form it; it has twenty varas of latitude and the Valdearanzo river passes through There is a tradition that half a chain that exists in the jail of this town is one that two Saracens put at said door to prevent the entry of Christians from the kingdom of Jaén. "Campillo was conquered from the Moors by D. Pedro Coello, Knight of the Vanda . His body was buried in the Campilla de San Luis de los Caballeros, of the disappeared Royal Convent of San Francisco de Jaén. His epitaph read like this: Here lies Pedro Coello, Knight of the Vanda, who won the castle of Arenas from the Moors at their expense and died in an entrance with them, during the reign of the Catholic Monarchs in 1486.