Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / Portugal's Lost Colony: The Battle for Colonia del Sacramento
Transcript
- Lucas: So, we've talked a lot about Portugal's empire in Asia and Africa, but there's a corner of South America we haven't touched yet. It's a place called Colonia del Sacramento, on the northern bank of the Rio de la Plata, directly across from Buenos Aires. Today it's a UNESCO World Heritage site in Uruguay, with cobblestone streets and Portuguese-style azulejo tiles. But back in 1680, it was a tiny, defiant outpost that nearly started a war between Portugal and Spain. Luna: Wait — I thought South America was divided between Spain and Portugal by the Treaty of Tordesillas. How did the Portuguese end up on the Rio de la Plata? Lucas: Great question. The treaty drew a line, but by the late 17th century, both empires had long since stopped respecting it. The Portuguese had been pushing south from Brazil for decades, looking for cattle, silver, and — most importantly — a route to the mineral wealth of Potosí. The Rio de la Plata estuary was the gateway. So in 1680, the Portuguese governor of Rio de Janeiro, Dom Manuel Lobo, got orders from Lisbon to establish a settlement on the opposite bank from Buenos Aires. The idea was to create a base for smuggling silver and maybe even claim a chunk of the Banda Oriental — what's now Uruguay. Lucas: Lobo sailed south with about 400 men, soldiers and settlers, and in January 1680, they landed on a small peninsula. They built a fort, laid out a grid of streets, and named it Colonia do Santíssimo Sacramento — the Colony of the Most Holy Sacrament. The location was strategic: it controlled the narrowest part of the river, and it was close enough to Buenos Aires to watch everything the Spanish did. Luna: I bet the Spanish in Buenos Aires noticed pretty fast. Lucas: They did. The governor of Buenos Aires, José de Garro, immediately protested. But Lisbon insisted the settlement was within Portugal's claimed territory. Garro wasn't convinced. He gathered a force of some 3,000 men — Spanish soldiers, militiamen, and a large number of Guaraní warriors from the Jesuit missions. In August 1680, after just seven months of Portuguese occupation, Garro launched a full assault on Colonia. Lucas: The Portuguese fort wasn't finished. Lobo had only a few cannon and maybe 200 men fit to fight. The Spanish attacked by land and sea. They overwhelmed the walls in a matter of hours. Lobo surrendered, and the Spanish tore down the Portuguese flag. It was a humiliating defeat. Lobo was taken prisoner and died soon after — some say from a broken heart, but probably more from dysentery. Luna: So the colony was gone before the year was out? Lucas: Yes, but here's where it gets interesting. Back in Europe, Portugal and Spain were technically at peace. In fact, they had signed a treaty in 1668 that ended years of war after Portugal's restoration of independence. So when news of Garro's attack reached Madrid and Lisbon, both courts were furious — but for different reasons. Spain was angry that Portugal had violated the Tordesillas line; Portugal was angry that Spain had attacked a settlement they claimed as their own. Lucas: What followed was two years of tense diplomacy, with each side trying to prove that the land belonged to them. Portugal argued that the Rio de la Plata region had never been effectively occupied by Spain, so it was terra nullius. Spain argued that centuries of papal bulls and the Treaty of Tordesillas gave them all of South America west of the line. Neither budged. Finally, in 1681, they signed the Treaty of Provisional Boundaries, which did something remarkable: it gave Colonia back to Portugal. Luna: So the Portuguese got their colony back after losing it in battle? Lucas: Exactly. The treaty was a temporary fix, but it showed that Spain — at least for the moment — was willing to accept a Portuguese presence on the Rio de la Plata rather than go to war. The colony was rebuilt, and the Portuguese returned in 1683. But the tension didn't go away. For the next century, Colonia changed hands between Portugal and Spain several times — sieges, captures, treaties that gave it back, then new conflicts. Lucas: The real engine behind Colonia's survival was smuggling. The Spanish empire had strict trade laws: all goods going to the colonies had to pass through a few designated ports, and everything had to be registered. But Buenos Aires was a frontier city, desperate for European goods. Portuguese merchants in Colonia would land ships with cloth, tools, wine, and slaves — then row them across the river under cover of night. Buenos Aires grew rich on this contraband, and the Spanish authorities in Lima and Madrid could hardly stop it. Luna: So the Spanish colony itself wanted the Portuguese there? Lucas: To some extent, yes. The local elites in Buenos Aires benefited enormously from the smuggling. They even had a saying: 'Colonia is the key to the river, and the river is the key to the Indies.' Of course, Madrid hated it. They saw Colonia as a dagger pointed at the heart of their empire. But every time they captured it, diplomatic pressure from Portugal — and sometimes from England, which supported Portugal — forced them to give it back. Lucas: This went on for over a century. Colonia was captured by Spain in 1705, returned in 1715 after the Treaty of Utrecht. Captured again in 1762, returned in 1763. Finally, in 1777, a massive Spanish expedition led by Pedro de Cevallos took the town for the last time. The Treaty of San Ildefonso that same year officially gave Colonia to Spain. By then, Portugal's focus had shifted to the interior of Brazil, and the old smuggling outpost wasn't worth the diplomatic cost anymore. Luna: It's amazing how this one little colony kept causing so much trouble. Lucas: It really was a microcosm of the entire Portuguese empire in its later years. A small, distant outpost, fiercely defended by a handful of people, constantly threatened by larger powers, and ultimately kept alive by a combination of smuggling, diplomacy, and sheer stubbornness. Colonia del Sacramento reminds us that even a lost colony can leave a lasting mark — those Portuguese street grids and azulejo tiles are still there today, a quiet testament to a forgotten frontier. Luna: I'll never look at a map of Uruguay the same way. Lucas: And next time, we'll talk about another borderland of the empire: the Amazon. The Portuguese had a whole other struggle there, against the Dutch, the French, and the jungle itself.