
King whose marriage united Spain.
Compare John II of Aragon with another historical figure:
John II of Aragon married Juana Enr
John II faced a rebellion from the Catalan nobility and the city of Barcelona, who opposed his centralizing policies and his appointment of a Castilian viceroy. The civil war lasted a decade, devastating Catalonia and weakening the Crown of Aragon, though John II ultimately retained control.
John II arranged the marriage of his son Ferdinand to Isabella I of Castile, a union that would eventually unite the crowns of Aragon and Castile. The marriage was conducted in secret due to opposition from Henry IV of Castile, but it laid the foundation for the creation of a unified Spanish kingdom.
See how John II of Aragon stacks up against other historical figures