The Restoration: How Portugal Broke Free from Spain and Fought to Survive

On the morning of 1 December 1640, a small group of Portuguese noblemen walked into the royal palace in Lisbon and committed treason. By lunchtime, it was a revolution.

The vicereine, Princess Margarida of Savoy, the Duchess of Mantua, a Habsburg appointee who governed Portugal on behalf of a Spanish king she had never met, was deposed. The deeply unpopular Secretary of State, Miguel de Vasconcelos, was found hiding in a wardrobe. The conspirators threw him out of a window. Within hours, the Duke of Braganza, the wealthiest landowner in Portugal, a man who had spent years cultivating a studied reputation for indecisive bookishness precisely so Madrid would not consider him a threat, was acclaimed as King João IV.

It was, by the standards of seventeenth-century regime change, remarkably tidy. Portugal, after sixty years under the Spanish Crown, was independent again.

The hard part, of course, was everything that came after.

Chapter One

Sixty Years of Someone Else’s Wars

To understand why Portuguese noblemen were throwing secretaries of state out of windows in December 1640, you have to understand what sixty years of the Iberian Union had done to Portugal.

When Philip II of Spain claimed the Portuguese throne in 1580, following the extinction of the Aviz dynasty in the catastrophic sands of Alcácer-Quibir, he had made promises. At the Cortes of Tomar in 1581, the new king guaranteed Portuguese autonomy: separate laws, separate courts, separate colonial administration. Portuguese offices would be filled by Portuguese men. The empire would remain Portuguese in all but its ultimate sovereign. It was a constitutional arrangement designed to make absorption painless, and for the first couple of decades, it more or less worked. Portuguese merchants gained access to Spanish silver. The rivalry between the two Iberian empires, which had been a constant source of friction since the Treaty of Tordesillas, was, at least nominally, over.

But constitutional promises have a half-life, and by the 1630s, these had decayed to nothing. Philip II had been careful. His son, Philip III, less so. His grandson, Philip IV, not at all. The Count-Duke of Olivares, Philip IV’s chief minister, a man of extraordinary ambition and disastrous judgment, decided that the time had come to centralise the Spanish monarchy properly. The separate kingdoms would be integrated. Their resources would be pooled. Their manpower would be mobilised for Spain’s wars.

Spain had a lot of wars. The Thirty Years’ War was devouring men and money across central Europe. The Dutch revolt, now in its seventh decade, showed no signs of resolution. France was hostile. Catalonia was restless. And Olivares, looking at a map of the Iberian Peninsula, saw in Portugal not an autonomous partner but an undertaxed province with soldiers and sailors who were not yet dying in Flanders.

The breaking point came in 1640. Catalonia erupted in open revolt. Olivares demanded that Portuguese nobles and conscripts be mobilised to suppress it, to march Portuguese soldiers into a Spanish civil war to enforce the authority of a Spanish king over a Spanish province. For the Portuguese elite, this was the final insult. They were being asked to bleed for a crown that had failed to protect their own empire.

And failure it was. The Iberian Union had turned Portugal’s former trading partners into enemies. The Dutch, at war with Spain, attacked Portuguese possessions not because they had any particular grievance against Lisbon but because Lisbon and Madrid had the same king. The Dutch West India Company had seized half of Brazil. The Dutch East India Company was systematically dismantling the Estado da Índia, picking off Portuguese fortresses from Malacca to Ceylon. Spain, consumed by its European wars, had done nothing to stop them. Portuguese wealth was being extracted to fund Castilian campaigns while Portuguese colonies burned on the other side of the world.

Something had to give.

Chapter Two

The Reluctant King and His Ambitious Wife

The conspiracy that produced the Restoration was not a mass uprising. It was a palace coup orchestrated by a handful of Portuguese nobles who needed, above all, a king. Their candidate was João, Duke of Braganza, the richest man in Portugal, a descendant of the old royal house, and a person who appeared, by every outward measure, to have no interest whatsoever in risking his neck.

João was a collector of music. He composed. He hunted. He managed his vast estates in the Alentejo with the careful attention of a man who understood that wealth, once acquired, is best preserved by not doing anything dramatic. The Spanish authorities had watched him for years and concluded, with some relief, that the Duke of Braganza was a comfortable provincial aristocrat who would never trade his estates for a throne he might not be able to hold.

They had not, however, factored in his wife.

Luísa de Gusmão was Spanish by birth, a Medina Sidonia, from one of the grandest families in Castile. She was also, by temperament, a woman who had married a duke and intended to die a queen. When the conspirators approached João with their proposal, he hesitated. When he brought the matter to Luísa, she did not. The line attributed to her, “Better to be queen for a day than duchess for a lifetime”, may be apocryphal, but it captures the dynamic precisely. João was pushed. Luísa pushed.

The Jesuits pushed too. The Society of Jesus, which maintained an extraordinary network of influence across the Portuguese empire, threw its institutional weight behind the Restoration. Jesuit preachers delivered patriotic sermons from pulpits across the country. Jesuit diplomats would soon serve as João IV’s most trusted envoys to the courts of Europe. The Society’s enthusiasm was not merely spiritual, Portuguese independence meant a Portuguese empire administered by Portuguese officials sympathetic to Jesuit interests, rather than by Spanish bureaucrats who might favour the Franciscans and Dominicans. God’s work and institutional politics have always been comfortable bedfellows.

The coup itself was almost anticlimactic. On 1 December, the conspirators seized the palace. Vasconcelos was defenestrated. The Duchess of Mantua was escorted to the border. The common people of Lisbon, who had never much enjoyed being governed from Madrid, celebrated in the streets. The lower clergy rang the church bells. The higher clergy composed Te Deums. João was crowned. Portugal was, on paper, free.

On paper, though, is where the easy part ended. Spain still had the largest army in Europe. It had not agreed to let Portugal go. And the newly independent kingdom had almost nothing with which to defend itself.

Chapter Three

An Empire Responds

The news from Lisbon rippled outward at the speed of horses and seventeenth-century sailing ships, which is to say, slowly enough for considerable anxiety in the interim. Would the empire follow? Would colonial governors, many of whom owed their appointments to Madrid, refuse to recognise the new king?

The answer came back, from nearly every corner of the Portuguese world: yes, they would follow. From Goa to Macau to Salvador da Bahia, local authorities swore allegiance to João IV throughout 1641. The transition was remarkably smooth, a testament less to the personal magnetism of the new king than to the depth of anti-Castilian sentiment across the empire. Sixty years of watching Spanish policy erode Portuguese commercial interests had made the case for independence far more eloquently than any conspirator’s pamphlet.

There was one exception: Ceuta. The Moroccan fortress, which had been in Portuguese hands since 1415, the very first conquest of the Age of Discovery, the place where Prince Henry the Navigator had first encountered the possibilities of overseas expansion, chose Spain. Its garrison declared for Philip IV and refused to recognise the Braganza king. Ceuta would never return. It remains Spanish to this day, a small irony given it was the foundation stone of the Portuguese empire.

The Portuguese had hoped that breaking from Spain would solve their Dutch problem. If Lisbon was no longer Madrid, then perhaps Amsterdam would stop burning Portuguese factories. A ten-year truce was signed with the Dutch at The Hague in June 1641, extending to the colonies. It was a reasonable expectation. It was also, as it turned out, catastrophically naive.

Chapter Four

The Treachery Beyond the Line

The directors of the Dutch West India Company had no intention of observing a truce that would require them to stop conquering profitable Portuguese territory. The ink was barely dry before WIC commanders received instructions to seize as much as possible before the truce could be locally ratified. In August 1641, weeks after the agreement was signed in The Hague, a Dutch fleet descended on Luanda, the vital slaving port in Angola. São Tomé followed. Maranhão in northern Brazil fell shortly after.

The message was unambiguous: European treaties meant nothing south of the equator.

In Asia, the VOC was equally contemptuous. Malacca had already fallen to the Dutch in January 1641. The VOC delayed implementing the ceasefire in Asia until late 1644, using the intervening years to consolidate their grip on the spice routes and begin the systematic conquest of Ceylon’s cinnamon coast. When the ten-year truce finally expired in 1652, the Dutch resumed open hostilities with undisguised enthusiasm. Colombo fell in 1656. Jaffna in 1658. The pepper-rich Malabar settlements, Quilon, Cranganore, Cochin, were picked off one by one.

João IV’s government watched this catastrophe unfold from Lisbon with very little ability to stop it. The reason was simple arithmetic: every soldier, every ship, every cruzado the crown possessed was needed for the war against Spain. Brazil, at least, could be saved, it was close enough to the Atlantic supply lines, and its population was large enough to mount its own resistance. Asia was simply too far away, too expensive to reinforce, and too strategically secondary when the survival of the metropole itself was at stake.

The choice was brutal but clear. Save Portugal first. Save Brazil second. Let Asia go.

Chapter Five

The War Nobody Could Win

The military confrontation between Portugal and Spain that followed the Restoration was not a war of grand campaigns and decisive manoeuvres. It was a twenty-eight-year grind, a conflict of seasonal border raids, siege warfare, and long stretches of mutual exhaustion punctuated by a handful of engagements that actually mattered.

Portugal’s initial position was precarious. It had no standing army. Its navy was depleted. Its border fortifications, particularly along the vulnerable Alentejo-Extremadura corridor, were antiquated. If Spain had launched a full-scale invasion in 1641, the Restoration might have lasted less than a year.

But Spain could not launch a full-scale invasion in 1641, because Spain was fighting everyone. The Thirty Years’ War consumed the tercios in Germany and the Low Countries. The Catalan revolt, which had erupted almost simultaneously with the Portuguese Restoration, demanded immediate military attention on Spain’s northeastern frontier. France, under Cardinal Mazarin, was probing every weakness. Philip IV and Olivares looked at the map and made a calculation: Catalonia was more dangerous than Portugal. The French were more dangerous than the Braganzas. The Portuguese front could wait.

It was, in strategic terms, a reasonable decision. It was also the decision that lost them Portugal forever.

The Portuguese used this breathing space with desperate efficiency. Foreign military engineers were hired to construct a chain of modern star-shaped fortifications along the Alentejo frontier, the state-of-the-art trace italienne bastions that could absorb cannon fire and resist the kind of siege warfare at which the Spanish were traditionally expert. Foreign mercenary officers were recruited to train a professional army. The kingdom that had had almost no military capacity in December 1640 spent the next fifteen years building one.

The first phase of the war, from 1640 to roughly 1656, was characterised by low-intensity border conflict, raiding parties, livestock theft, village burnings, and the occasional small-scale siege. It was destructive, demoralising, and inconclusive. Both sides lacked the resources for anything more ambitious.

Chapter Six

The Dangerous Years

Everything changed in the late 1650s. João IV died in 1656, leaving the throne to his young and mentally unstable son, Afonso VI, under the regency of Queen Luísa de Gusmão. Internal Portuguese politics became chaotic, a regency government managing a fragile kingdom while fighting a war on its border.

Spain sensed opportunity. The Treaty of the Pyrenees in 1659, which finally ended the long war between France and Spain, was a disaster for Portuguese strategic planning. It freed up veteran Spanish troops, the hardened tercios that had been fighting in Flanders and Italy for decades, and allowed Philip IV to redirect them toward the Portuguese frontier.

The Battle of the Lines of Elvas in January 1659 provided a brief reprieve. A Portuguese garrison sortied from the besieged fortress and routed the Spanish army in a chaotic engagement that inflicted catastrophic losses. It was a victory, but it was also a warning: Spain was now paying serious attention, and the next attack would come with the full weight of the empire behind it.

Portugal responded with its own escalation. In 1660, the crown secured the services of Count Friedrich Hermann von Schönberg, a brilliant German-born, French-trained mercenary commander who brought not just tactical expertise but an entire school of European military thinking to the Portuguese army. Schönberg reorganised the command structure, imposed discipline, and introduced the combined-arms tactics that had been refined in the continental wars.

The other piece of the puzzle was diplomatic. Portugal needed an ally with a navy, an army, and a willingness to antagonise Spain. England, under the recently restored Charles II, fit the description, for a price.

Chapter Seven

The Bride, the Dowry, and the Empire

The marriage of Catherine of Braganza to Charles II of England in 1662 was one of the most consequential diplomatic transactions of the seventeenth century. It was also, from the Portuguese perspective, one of the most expensive.

The origins of the Anglo-Portuguese alliance, the world’s oldest still-functioning diplomatic relationship, predated the Restoration by centuries. But the alliance had always been intermittent and instrumental. João IV had signed a treaty with England in 1642 that theoretically permitted recruitment of English soldiers and ships, but the English Civil War had rendered it useless. Under Cromwell, Portugal negotiated a far more binding agreement in 1654, but on terms that amounted to a commercial diktat: English merchants received sweeping privileges in Portugal and its colonies, including freedom of worship, unrestricted trading rights, and the appointment of a Judge-Conservator to handle disputes. These were concessions that would have been unthinkable before 1640, but the need for English naval protection against the Dutch was so acute that the Braganza government swallowed them.

The 1661 marriage treaty went further, much further. To secure English military and naval support, Queen Regent Luísa de Gusmão offered Charles II a dowry of two million cruzados, roughly half a million pounds, an enormous sum for a kingdom already bankrupted by war. She also ceded two territorial possessions that would reshape the map of two continents: Tangier, on the North African coast, and Bombay, on the western shore of India.

Tangier proved too expensive for England to maintain and was abandoned in 1683, the fortifications dynamited as the garrison withdrew. Bombay was another matter entirely. Its magnificent natural harbour, far superior to anything the Portuguese possessed at Goa or Bassein, became the foundation of British imperial power in Asia. The East India Company took possession, built docks and warehouses, attracted merchants from across the Indian Ocean, and transformed a modest Portuguese outpost into one of the great commercial cities of the world. From the Nanban perspective, the transfer of Bombay represents a kind of poetic closing bracket: the empire that had pioneered European trade in Asia handed the key to its eventual successor, not through conquest, but through a marriage contract signed in desperation.

In exchange for these massive concessions, England provided what Portugal needed most: soldiers. Thousands of English, Scottish, and Irish mercenaries were recruited under the terms of the treaty. English warships patrolled the Portuguese coast, protecting the incoming Brazil fleets and deterring Spanish seaborne invasion. English infantry and cavalry, fighting alongside Schönberg’s reorganised Portuguese forces, would prove decisive in the battles that finally broke Spanish offensive capacity.

Chapter Eight

The Battles That Ended an Empire’s Patience

The decisive phase of the War of Restoration lasted barely four years, from 1662 to 1665. Spain threw its best commanders and its veteran armies at the Portuguese frontier. Portugal, reinforced by English and French mercenaries and commanded by Schönberg, threw them back.

The Battle of Ameixial in June 1663 was the first shock. Philip IV’s illegitimate son, Don Juan José de Austria, a capable general bearing the most resonant military name in Spanish history, had led a major invasion into the Alentejo and successfully captured Évora, Portugal’s second-largest city. It was the deepest Spanish penetration of the war, and it looked, briefly, as though the Restoration might be undone.

Weeks later, a Portuguese army under the nominal command of Sancho Manuel, Conde de Vila-Flor, but tactically directed by Schönberg, intercepted Don Juan’s forces near the village of Ameixial. The engagement was fierce, confused, and ultimately catastrophic for Spain. English contingents fought with particular distinction. Don Juan was forced to abandon Évora and retreat across the border with the remnants of an army that had expected to march on Lisbon.

The final reckoning came at Montes Claros in June 1665. A Spanish army under the Marquis of Caracena had besieged Vila Viçosa, the ancestral seat of the Braganza dynasty, a target chosen for its symbolic as much as its strategic value. The Portuguese army, commanded by the Marquis of Marialva with Schönberg again directing tactical deployments, met the Spanish in the field and annihilated them. The defeat was so comprehensive that it reportedly broke the health of the ailing Philip IV, who died shortly afterwards.

The armies engaged at these battles were not enormous by the standards of the Thirty Years’ War, typically ten to twelve thousand infantry and three to five thousand cavalry per side. But they were the best Spain could field on this front, and their destruction proved something that Madrid had been reluctant to accept: the Portuguese army, after twenty-five years of rebuilding, was not the rabble of 1640. It was a professional force, trained in modern European tactics, led by experienced officers, and fighting on terrain it knew intimately. The star-shaped fortresses held. The new cavalry could match the Spanish horse. The infantry, stiffened by English and French veterans, could stand against the tercios.

Spain’s fundamental problem was logistical. Sustaining an invasion force of twenty thousand men across the Alentejo frontier, through hostile territory, with extended supply lines, against a fortified border, was a nightmare of seventeenth-century military administration. The Spanish could capture towns. They could not hold them. They could win skirmishes. They could not win the war.

Chapter Nine

Peace at Last

With Spain’s offensive capacity shattered, its king dead, and a child, the sickly Charles II, last of the Spanish Habsburgs, on the throne, the conditions for peace finally aligned. France, under Louis XIV, was preparing its own assault on Spanish possessions, and Madrid needed to close the Portuguese front before it faced a two-front war it could not possibly sustain.

The Treaty of Lisbon, signed on 15 February 1668 and brokered by the English, formally recognised Portuguese independence. It was a simple document for such a momentous conclusion. Spain acknowledged the Braganza dynasty. Portugal acknowledged reality. The twenty-eight-year war was over.

Portugal had survived. But survival, as every Portuguese diplomat of the period understood, came with a bill.

Chapter Ten

The Price of Freedom

The cost of independence was paid in three currencies: territory, sovereignty, and economic autonomy.

The territorial ledger was devastating. Everything lost during the Iberian Union, and everything lost during the desperate decades of the Restoration war, stayed lost. Malacca, the key to Southeast Asian trade, was Dutch. Ceylon, with its cinnamon wealth, was Dutch. The Malabar Coast fortresses, Cochin, Cranganore, Quilon, Cannanore, were Dutch. Muscat, the guardian of the Persian Gulf trade, had fallen to the Omani Arabs. In North Africa, Ceuta was permanently Spanish, and Tangier had been handed to the English. The Portuguese Estado da Índia, which at its peak had controlled a trading network stretching from Mozambique to Macau, was reduced to Goa, a handful of coastal enclaves, Macau, and Timor.

The peace with the Dutch Republic, finalised in 1661 with a supplementary treaty in 1669, required Portugal to pay a staggering indemnity of four million cruzados, the price for Dutch recognition that Brazil and Angola were Portuguese. This debt took decades to service and was partly funded by assigning the Dutch the revenues from Portugal’s lucrative Setúbal salt trade. The Dutch also extracted the same sweeping commercial privileges that the English had obtained: freedom of worship, extraterritorial legal rights, and unrestricted trading access.

The English alliance, for all its military benefits, had transformed Portugal from an independent maritime power into what later historians would call a commercial satellite. The Cromwellian treaty of 1654 and the Catherine of Braganza marriage settlement of 1661 had opened Portuguese and colonial markets to English goods on terms that Portuguese merchants could not match. When the Methuen Treaties of 1703 deepened this relationship further, exchanging English textile access for preferential wine tariffs, the economic pattern was set for a century. Brazilian gold, which should have capitalised Portuguese industry, flowed instead to London, paying for English manufactures that flooded Lisbon and the colonies. Portugal had traded economic independence for political survival. It was, given the alternatives, a rational choice. It was also an irreversible one.

And then there was Japan.

Chapter Eleven

The Door That Would Not Reopen

For the readers of this site, the Restoration’s most poignant consequence is the one that played out not in Europe but in Nagasaki harbour.

The newly independent Portuguese crown had one card it desperately wanted to play in Japan: the argument that Portugal was no longer Spain. The entire rationale for expelling the Portuguese in 1639 had been entangled with the politics of the Iberian Union, the suspicion that the Portuguese were agents of a universal Catholic monarchy, the conflation of Portuguese merchants with Spanish imperial ambition, the fear that the padres served a king in Madrid as much as a pope in Rome. If Portugal was independent again, if the House of Braganza had broken with the Habsburgs, then surely the Tokugawa shogunate would reconsider?

The 1640 Macau Embassy, dispatched before the Restoration’s news had even reached Asia, had already been answered with 61 severed heads. The 1644–1647 embassy, sent explicitly under the authority of the newly independent King João IV, carried the Restoration’s diplomatic argument directly to Japan: we are not Spain; we never wanted to be Spain; please let us trade again.

The shogunate did not care. Captain Gonçalo de Siqueira de Souza and his delegation sat anchored off Nagasaki for over a month, forbidden to disembark, while the bakufu mobilised regional daimyō forces along the coast as a show of overwhelming military readiness. The embassy was ordered to leave. The message was the same as it had been in 1640, only delivered this time without the executions: Japan was closed. The reasons were Japan’s own. The distinction between a Portuguese king and a Spanish king was, from the Tokugawa perspective, a European problem of no interest whatsoever.

The doors had closed not because of the Iberian Union, but because of Christianity. And Christianity was not a Spanish export. It was a Portuguese one.