What POD is needed to unite all of Iberia? The two that come to mind for me at least are the Spanish invasion during the 7 years war and a Napoleonic victory in the Peninsular war.
What POD is needed to unite all of Iberia? The two that come to mind for me at least are the Spanish invasion during the 7 years war and a Napoleonic victory in the Peninsular war.
What POD is needed to unite all of Iberia? The two that come to mind for me at least are the Spanish invasion during the 7 years war and a Napoleonic victory in the Peninsular war.
You could also have Isabella be married to John II instead of Ferdinand, although I suppose that'd just be Castile and Portugal instead of Spain and Portugal, with an independent Aragon (though of course it could end up part of the country later on).
The problem with the Habsburgs uniting Spain, is that they never tried to unite their possessions as a single realm. This was good in the case of Hapsburg lands in Italy and the Spanish Netherlands, but bad if you wanted the Iberian Peninsula united. Even Castile and Aragon were held in what was little more than a Personal union until after the Bourbons took over.The easiest by far would be the survival of Miguel de la Paz, son of Manuel I of Portugal and Isabella of Aragon. Isabella was the eldest daughter of Ferdinand II of Aragon and Isabelle I of Castille: she was heiress to both Castille and Aragon when her brother Juan died. Miguel would have inherited the three Kingdoms of Castille, Aragon and Portugal eventually. Unless Miguel were to die childless, the union would probably last long after his death.
The second choice is to have Spain keep control of Portugal under the Hapsburgs. That being said, it's a bit harder to achieve, especially given the policies of the Hapsburgs in Spain.