These insults induced Henry plot against Alfonso. In a meeting at Maluenda in 1255, Henry temporarily brought James I of Aragon over to his side. Finally, in October, leagued with Diego López IV de Haro, lord of Biscay, and drawing support from Galicia as well, he went into open rebellion. Despite an initial victory over troops of the royal party, he was defeated near Morón and forced to flee the country. He took ship at Cádiz and sailed through the Mediterranean, stopping at Valencia, and passed through France, initially seeking refuge with his stepmother in Ponthieu. She may have suggested he visit his half-sister Eleanor, who was married to Edward, the son and heir of King Henry III of England.