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Events on Monday 25 August 1580 1
1580Battle of AlcântaraSpanish forces crush Portuguese resistance near LisbonOn 25 August 1580, troops under the Duke of Alba defeated forces loyal to António, Prior of Crato, just outside Lisbon. The victory opened the road to the Portuguese capital and secured Philip II of Spain's claim to the Portuguese throne, cementing the dynastic union of the two crowns.