Signs of military decline began with the Battle of Alcácer Quibir in Morocco in 1578; this defeat led to the death of King Sebastian and the imprisonment of much of the high nobility, which had to be ransomed at great cost.
However, scholars like Jean Markale and Tranoy propose the Celtic branches all share the same origin, and placenames such as Cale, Gal, Gaia, Calais, Galatia, Galicia, Gaelic, Gael, Gaul (Latin: Gallia),[9] Wales, Cornwall, Wallonia and others all stem from one linguistic root.
[36] Based on the Roman chronicles about the Callaeci peoples, along with the Lebor Gabála Érenn[37] narrations and the interpretation of the archaeological remains throughout the northern half of Portugal and Galicia, it is possible to infer that there was a matriarchal society, with a military and religious aristocracy probably of the feudal type.
[citation needed] The first documentary references to Castro society are provided by chroniclers of Roman military campaigns such as Strabo, Herodotus and Pliny the Elder among others, about the social organization, and describing the inhabitants of these territories, the Gallaeci of Northern Portugal as: "A group of barbarians who spend the day fighting and the night eating, drinking and dancing under the moon."
In 212 AD, the Constitutio Antoniniana gave Roman citizenship to all free subjects of the empire and, at the end of the century, the emperor Diocletian founded the province of Gallaecia, which included modern-day northern Portugal, with its capital at Bracara Augusta (now Braga).
In what is now Alentejo, vines and cereals were cultivated, and fishing was intensively pursued in the coastal belt of the Algarve, Póvoa de Varzim, Matosinhos, Troia and the coast of Lisbon, for the manufacture of garum that was exported by Roman trade routes to the entire empire.
[40] The Romans founded numerous cities, such as Olisipo (Lisbon), Bracara Augusta (Braga), Aeminium (Coimbra) and Pax Julia (Beja),[42] and left important cultural legacies in what is now Portugal.
After the assassination of the patrician Flavius Aëtius, Rechiar attempted, yet again, to conquer the whole of the peninsula, however his ambitions were derailed by the invading Visigoths under their king and Roman foederatus Theodoric II acting on the orders of the emperor Avitus.
After a decisive victory over King Roderic at the Battle of Guadalete on 19 July 711, Tariq ibn-Ziyad, joined by the Arab governor Musa ibn Nusayr of Ifriqiya, brought most of the Visigothic kingdom under Muslim occupation in a seven-year campaign.
After defeating the Moors in the Battle of Covadonga in 722 AD, Pelagius was proclaimed king to found the Christian Kingdom of Asturias and start the war of reconquest known in Portuguese (and Spanish) as the Reconquista.
[68] Currently, historians and archaeologists generally agree that northern Portugal between the Minho and the Douro rivers kept a significant share of its population, a social and political Christian area that until the late 9th century had no acting state powers.
At the end of the 9th century, a small minor county based in the area of Portus Cale was established by Vímara Peres on the orders of King Alfonso III of León, Galicia and Asturias.
In 1418, two of Prince Henry the Navigator's captains, João Gonçalves Zarco and Tristão Vaz Teixeira, were driven by a storm to an island that they called Porto Santo ("Holy Port") in gratitude for their rescue from the shipwreck.
Some historians have claimed that the Portuguese had already performed fairly accurate calculations concerning the size of the world and therefore knew that sailing west to reach the Indies would require a far longer journey than navigating to the east.
[88] In early 1500, Pedro Álvares Cabral set sail from Cape Verde with 13 ships and crews and nobles such as Nicolau Coelho; the explorer Bartolomeu Dias and his brother Diogo; Duarte Pacheco Pereira (author of the Esmeraldo); nine chaplains; and some 1,200 men.
In 1521, a force under Antonio Correia conquered Bahrain and ushered in a period of almost 80 years of Portuguese rule of the Persian Gulf archipelago[94] On the Asiatic mainland, the first trading stations were established by Pedro Álvares Cabral at Cochin and Calicut (1501).
West of the small brook Alcântara, the Spanish encountered a Portuguese force on the eastern side of it, commanded by António, and his lieutenant Francisco de Portugal, 3rd Count of Vimioso.
In late August, the Duke of Alba defeated António's force, a ragtag army assembled in a hurry and composed mainly of local peasants, and freed slaves at the Battle of Alcântara.
King John IV's eldest son came to reign as Afonso VI, however his physical and mental disabilities left him overpowered by Luís de Vasconcelos e Sousa, 3rd Count of Castelo Melhor.
Disregarding traditional Portuguese institutions of governance, John V acted as an absolute monarch, nearly depleting the country's tax revenues on ambitious architectural works, most notably Mafra Palace, and on commissions and additions for his sizeable art and literary collections.
However, historians also argue that Pombal's "enlightenment" and economic progress, while far-reaching, was primarily a mechanism for enhancing autocracy at the expense of individual liberty and an apparatus for crushing opposition, suppressing criticism, furthering colonial exploitation, intensifying book censorship and consolidating personal control and profit.
The arrival of a force of British troops helped the Portuguese army commanded by the Count of Lippe by blocking the Franco-Spanish advance and driving them back across the border following the Battle of Valencia de Alcántara.
In 1807, Portugal refused Napoleon Bonaparte's demand to accede to the Continental System of embargo against the United Kingdom; a French invasion under General Junot followed, and Lisbon was captured on 8 December 1807.
Historian Stanley Payne points out, "The majority of Republicans took the position that Catholicism was the number one enemy of individualistic middle-class radicalism and must be completely broken as a source of influence in Portugal.
The PRP viewed the outbreak of the First World War as a unique opportunity to achieve a number of goals: putting an end to the twin threats of a Spanish invasion of Portugal and of foreign occupation of the African colonies and, at the internal level, creating a national consensus around the regime and even around the party.
In August 1919 a conservative president was elected – António José de Almeida (whose Evolutionist party had come together in wartime with the PRP to form a flawed, because incomplete, Sacred Union) – and his office was given the power to dissolve parliament.
[citation needed] Lisbon, maintaining air connections with Britain and the U.S., became a hotbed of spies of several war parties and served as the base for the International Red Cross in its distribution of relief supplies to POWs.
[159] Portugal, during this period, was never an outcast, and was a founding member of the North Atlantic Treaty Organization (NATO), the Organisation for Economic Co-operation and Development (OECD) and the European Free Trade Association (EFTA).
However, despite an overall crisis from 1973 to 1985, there were some years of very high economic growth, and reforms were enacted that allowed to improve standards of living and level of development, such as the construction of a true Social Security scheme, universal health coverage and the continuation of the process of increasing access to education.
[180] However, the economy has been stagnant since the early 2000s (around the accession to Euro) and was hit hard by the effects of the Great Recession: public debt (historically below or in average to that of Europe[166] and Germany[181]) shot up from 68% of GDP in 2007 to 126% in 2012,[182] which was one of the factors that led to a 78-billion-euro IMF/EU-monitored bailout from 2011 to 2014.