In 1512, Ferdinand, King of Aragon and regent of Castile, invaded Navarre, initiating a war that lasted over 18 years. Three years later, Francis's father died when Francis was only nine years old. In 1516, Francis's brothers participated in a failed Navarrese-French attempt to expel the Spanish invaders from the kingdom. The Spanish Governor, Cardinal Cisneros, confiscated the family lands, demolished the outer wall, the gates, and two towers of the family castle, and filled in the moat. In addition, the height of the keep was reduced by half. Only the family residence inside the castle was left. In 1522, one of Francis's brothers participated with 200 Navarrese nobles in dogged but failed resistance against the Castilian Count of Miranda in Amaiur, Baztan, the last Navarrese territorial position south of the Pyrenees.