The OTL 1580-1640 was a union destined to fail for reasons stated by Lusitania. Portugal felt its needs ignored by the Hapsburgs, who were trying to centralise the union under Madrid.
If the 1640 revolution failed, it would be followed by others until it succeeded, as the conditions that caused it would increase the discontent in all levels of society.
If the 1640 revolution failed, it would be followed by others until it succeeded, as the conditions that caused it would increase the discontent in all levels of society.