Portuguese Restoration War

The Restoration War between Portugal and Spain began with the Portuguese revolution of 1640 and ended with the Treaty of Lisbon in 1668, bringing a formal end to the Iberian Union. The period from 1640 to 1668 was marked by periodic skirmishes between Portugal and Spain, as well as short episodes of more serious warfare, much of it occasioned by Spanish and Portuguese entanglements with non-Iberian powers.

Source: Wikipedia — Portuguese Restoration War (CC BY-SA 4.0)