Example image of eyePlorer eyePlorer map for 'Anglo-Portuguese Alliance': Collective security England Portugal Succession of states Treaty of Windsor (1386) United Kingdom 1373 June 13 Middle Ages Iberian Peninsula Napoleonic Wars Peninsular War United Kingdom of Great Britain and Ireland House of Aviz Afonso I of Portugal Second Crusade Siege of Lisbon Battle of Aljubarrota Crown of Castile Edward III of England Galicia (Spain) Henry IV of England John of Gaunt, 1st Duke of Lancaster Lancaster, Lancashire John I of Portugal Philippa of Lancaster Golden Age History of Portugal (1415–1542) Luís de Camões Anglo-Norman Court Cod Commerce Cork material Oil Porto Royal family Salt Textile Wine Dynastic union Iberian Union Anglo-Spanish War (1585) Dutch–Portuguese War English Restoration Portuguese Restoration War Battle of Blenheim Duchy of Savoy France War of the Spanish Succession