Portugal

The Iberian Peninsula on which modern Portugal sits has been inhabited since the Paleolithic, and by the first millennium BCE its western coast was home to Celtic and pre-Celtic peoples, most prominently the Lusitanians, alongside Phoenician, Greek, and Carthaginian trading settlements. Rome incorporated the region in the second and first centuries BCE after prolonged campaigns, including the resistance led by the Lusitanian chief Viriathus, and organised it largely as the province of Lusitania. Roman rule left enduring legal, linguistic, and urban foundations before giving way in the fifth century CE to Germanic successor kingdoms, principally the Suebi in the northwest and later the Visigoths, who unified most of the peninsula under their crown.

Muslim forces from North Africa crossed into Iberia in 711 and rapidly absorbed the territory of present-day Portugal into al-Andalus, where Arab and Berber rule reshaped agriculture, commerce, and learning for several centuries. The Christian Reconquista pushed southward from the northern mountains, and the County of Portugal emerged as a vassal of the Kingdom of León. In 1139 Afonso Henriques proclaimed himself king after the Battle of Ourique, and the new Kingdom of Portugal was recognised by León in the Treaty of Zamora in 1143 and confirmed by the papacy in 1179. The conquest of the Algarve in 1249 fixed borders that have remained among the most stable in Europe.

From the early fifteenth century Portugal pioneered European maritime expansion, beginning with the capture of Ceuta in 1415 and continuing under figures such as Henry the Navigator, Bartolomeu Dias, Vasco da Gama, and Pedro Alvares Cabral. The resulting empire stretched across Brazil, parts of Africa, the Indian Ocean rim, and Asia, and was formally divided with Castile by the Treaty of Tordesillas in 1494. A dynastic crisis brought the Iberian Union with Spain from 1580 to 1640, ended by the Restoration War and the accession of the House of Braganza. The 1755 Lisbon earthquake, the Napoleonic invasions, and the flight of the court to Brazil weakened the metropole, and Brazil declared independence in 1822, leaving Portugal to fight a civil war between liberal constitutionalists and absolutists in the 1830s.

The constitutional monarchy was overthrown by republican revolution in October 1910, but the First Republic proved unstable and was replaced in 1926 by a military coup. Antonio de Oliveira Salazar consolidated power as finance minister and from 1932 led the authoritarian Estado Novo, which kept Portugal officially neutral in the Second World War, joined NATO as a founding member in 1949, and waged colonial wars in Angola, Mozambique, and Guinea from 1961. The Carnation Revolution of 25 April 1974 ended the dictatorship, and the new democratic state granted independence to its African and Asian territories, with East Timor occupied by Indonesia and Macau handed to China in 1999.

A new constitution took effect in 1976, and Portugal joined the European Economic Community in 1986 and adopted the euro in 1999. The country weathered the sovereign debt crisis of 2010 to 2014 under an international assistance programme and has since alternated centre-left and centre-right governments. Portugal is today a unitary semi-presidential republic, with an elected president, a prime minister accountable to the Assembly of the Republic, and the autonomous regions of the Azores and Madeira.