Pedro Fernández de Castro, who had promised King Alfonso XI to help in the fight against Juan Manuel, went with his troops to Peñafiel and challenged Juan Manuel to fight.
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In 1336 the Castilian-Leonese troops under the command of Enrique Enríquez the Younger, together with those of Pedro Ponce de León the Elder, Lord of Marchena, and those of Juan Alonso Pérez de Guzmán y Coronel, lord of Sanlúcar de Barrameda, defeated the troops of King Alfonso IV of Portugal in the battle of Villanueva de Barcarrota.