Nueva Planta decrees

Angered by what he saw as sedition by the realms of the Crown of Aragon, who had supported the claim of Charles of Austria to the Spanish thrones during the war and taking his native France as a model of a centralised state, Philip V suppressed the institutions, privileges, and the ancient charters (Spanish: fueros, Catalan: furs) of almost all the areas that were formerly part of the Crown of Aragon, the Kingdom of Aragon, the Principality of Catalonia, the Kingdom of Valencia, and the Kingdom of Majorca.

The other historic territories (Navarre and the other Basque territories) supported Philip V initially, whom they saw as belonging to the lineage of Henry III of Navarre, but after Philip V's military campaign to crush the Basque uprising, he backed down on his intent to suppress home rule.

One of the main goals of the decrees was the replacement of the administrative and public law of each entity of the Crown of Aragon.

The decrees erased all internal borders and tariffs except for the Basque territory and granted all citizens of the newly created Spanish state the right to trade with the American and Asian colonies, which henceforth were no longer the exclusive domain of the Crown of Castile.

However, the application of Castilian as a single administrative language had one exception in the Vizcaya Chamber of the Valladolid Court, where the use of Basque was permitted.