Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / The Battle of Diu: How Portugal Crushed the Mamluk Fleet
Transcript
- Lucas: So we've talked a lot about how Portugal built its empire in Asia — the spice routes, the forts, the key figures like Afonso de Albuquerque. But there's one battle that really sealed the deal, and it happened before Albuquerque even took over. I'm talking about the Battle of Diu, in 1509. Luna: Diu — that's the island off the coast of Gujarat, right? I've heard of it as a Portuguese colony. Lucas: Exactly. But before it became a sleepy colonial outpost, it was the site of one of the most decisive naval battles of the age. The Portuguese had been in the Indian Ocean for about a decade since Vasco da Gama's first voyage, and they were trying to control the spice trade. But they had serious rivals — the Mamluks of Egypt, who didn't want them muscling in on their own trade routes through the Red Sea. Lucas: So the Mamluks decided to build a navy. They had access to timber from the Black Sea via the Ottomans, and they assembled a fleet in the Red Sea port of Suez. In 1508, that fleet sailed down the east African coast, and then across to the Indian subcontinent. Their goal was to link up with the Sultan of Gujarat and kick the Portuguese out of the Indian Ocean. Luna: And this is where Francisco de Almeida comes in, right? He was the first viceroy of Portuguese India. Lucas: Yes, but here's the personal twist. Before the big battle, there was a smaller engagement off Chaul, where the Mamluk-Gujarati fleet actually defeated a Portuguese squadron. And in that fight, Francisco de Almeida's son, Lourenço, was killed. He was a talented young commander, and his father was devastated. So when the two fleets met again at Diu, Almeida was out for revenge. Lucas: The Portuguese had about nineteen ships — carracks, caravels, and galleons. The Mamluk-Gujarati fleet was larger, maybe forty or fifty vessels, including large dhows and galleys. But the Portuguese had something the others didn't: heavy cannons that could fire broadside, and they were much more manoeuvrable. Luna: So it was basically a mismatch in technology. Lucas: Kind of. But the Mamluk commander, Amir Husain, had some artillery too, and he'd protected his ships with cotton bales to absorb cannonballs. But the Portuguese tactics were just superior. They closed in, fired devastating broadsides, and boarded. The battle lasted around six hours, and by the end, the Mamluk fleet was essentially destroyed. Hussain escaped, but many of his ships were captured or sunk. Lucas: The aftermath was brutal. Almeida was furious that Hussain got away, and he took it out on the town of Dabul, which had harboured the enemy. He sacked it, and reportedly showed no mercy. It was a warning to anyone who'd think of defying the Portuguese. Luna: That's harsh. But it also sent a message across the Indian Ocean. Lucas: Absolutely. The Battle of Diu effectively removed the Mamluk threat and the Gujarat navy as a serious force. The Sultan of Gujarat quickly asked for peace, and the Portuguese got the island of Diu as a concession — they built a fort there in 1535, which became a key stronghold. But more importantly, the battle showed that no one could challenge Portuguese naval power in the Indian Ocean for decades. Lucas: And it paved the way for Albuquerque's later conquests — Goa, Malacca, Hormuz. Without the control of the seas that Diu secured, those wouldn't have been possible. Luna: It's like they had to win the naval battle before they could take the ports. Lucas: Exactly. And there's a fascinating detail — the commander of the Gujarati forces at Diu was Malik Ayaz, a man who had been a slave but rose to become the governor of Diu. He survived the battle, and he actually became a sort of double agent, playing the Portuguese against the Mamluks and vice versa. He was the one who negotiated the treaty after the battle, giving the Portuguese trading rights in return for peace. Lucas: So while Almeida was hot for revenge, Malik Ayaz was cooler and more pragmatic. He saw that the Portuguese were here to stay, and he tried to find a way to coexist. It's that kind of complexity that makes this history so fascinating. Luna: It's like a chess game, but with cannons. Lucas: And blood. But you know, it's a story that isn't as well known as it should be. When people think of Portuguese naval victories, they think of Vasco da Gama or maybe the conquest of Malacca. But Diu was arguably the most important naval battle in the Indian Ocean before the arrival of the Dutch and the English. Lucas: And it's a testament to the Portuguese strategy — they didn't just rely on trade, they relied on the sword and the cannon to enforce their monopoly. They had something called the cartaz, which was a pass that every ship in the Indian Ocean had to carry to prove they had permission to trade with the Portuguese. If they didn't have it, they were fair game for attack. That system was born out of the confidence that came from victories like Diu. Luna: That's a whole other layer of control. It's like they were the cops of the sea. Lucas: In a way, yes. But it was a brutal cop that didn't hesitate to sink ships and drown crews. Still, it was astonishingly effective — for a while, the Portuguese had a near-total monopoly on the most valuable spice trade routes, and Diu was the key that unlocked it. Lucas: One thing that strikes me is how personal this victory was for Almeida. He lost his son, and in that battle, he got his revenge. But he didn't live long to enjoy it — he was killed later that year in a skirmish at the Cape of Good Hope, on his way back to Portugal. His victory at Diu, though, had already changed the course of history. Luna: It's almost poetic — a father avenging his son, but then not getting to see the fruits of his victory. Lucas: Yeah. And the fact that the battle is relatively obscure today is a shame. But that's why we're doing this episode, to shine a light on it. And honestly, the fact that we can do episodes like this, diving deep into these moments, is thanks to the listeners who support us. We don't have ads on this show — it's funded entirely by a small group of people who chip in a few euros a month through buy me a coffee dot com slash fexingo. It's what keeps us going, and we're grateful for it. Luna: Yeah, it really does make a difference. Lucas: But back to the story — after Diu, the Portuguese also turned their attention to the Red Sea itself. They tried to block the Mamluks from rebuilding their fleet, and they even raided the port of Suez a few times. But the Red Sea remained a difficult place to operate, with its shallow waters and strong currents. So they never fully controlled it, but they did make it risky for Muslim shipping. Lucas: The battle also had a profound effect on the local powers. The Sultan of Gujarat, Mahmud Begada, was so shaken that he agreed to allow the Portuguese to build a fortress at Diu, which they eventually did in 1535. That fort became a symbol of Portuguese power, and Diu remained under Portuguese control until 1961, when it was taken by India. Luna: So the legacy of that single battle lasted for over four hundred years. Lucas: Exactly. And it's a reminder that history is often made in a single day, by a combination of courage, technology, and a bit of luck. The Battle of Diu was one of those moments where the world was turned on its axis, and the effects are still felt today in the distribution of languages, religions, and cultures across the Indian Ocean rim. Lucas: So when you think about Portugal's global empire, don't just think of the explorers and the merchants. Think of the sailors and the gunners who fought at Diu, and the strategic genius of men like Almeida who understood that control of the sea was the key to everything else. It's a story that deserves to be remembered. Luna: And it makes me want to dig even more into that period. Maybe we could do an episode on the cartaz system next time? Lucas: That's a great idea — the cartaz was such a unique instrument of power. We'll put that on the list. But for now, I think we've given you a good taste of the Battle of Diu and its significance. Thanks for joining us on this journey, and we'll see you next time.