Between May and September 1565, a rocky island in the middle of the Mediterranean became the site of one of the bloodiest sieges in early modern history. The Ottoman Empire, at the peak of its reach, landed a force that contemporary sources put as high as 48,000 men. Waiting for them: roughly 500 Knights of the Order of St John, a few thousand Spanish soldiers, and thousands of Maltese militia. They totalled between 8,000 and 9,000 defending forces, including a civilian population with nowhere to go. The defenders were outnumbered at least four to one. They held out for nearly four months, and the story of how they managed it is more complicated — and in some ways less flattering — than the legend usually allows.
John T explains.
The main events of the Great Siege of Malta. Grand hall of the Palace of the Grand Masters in Valletta, by Mattia Perez d'Aleccio.
Why Malta Mattered
The Knights of St John had been raiding Ottoman shipping for years. They hit merchant vessels and interfered with trade. They even went after traffic linked to the pilgrimage to Mecca. For Sultan Suleiman the Magnificent, the Order was a humiliation — a small band of Christian corsairs operating from a barren island that happened to sit in the middle of every important sea route in the Mediterranean.
The usual line is that Suleiman wanted Malta as a springboard for invading Sicily. That may have been part of the calculation, but the campaign was also about prestige and about ending the Hospitaller raids that had been irritating Istanbul for decades. The Divan formally agreed the expedition in October 1564. By the spring of 1565, the fleet was ready.
The Numbers Problem
The figures everyone quotes need qualifying. Francisco Balbi di Correggio, a soldier who kept a diary during the siege and remains the most cited eyewitness, put the Ottoman force at around 48,000. Ottoman campaign registers that Arnold Cassola recovered from Istanbul tell a different story — closer to 23,000 to 25,000 regular troops, including several thousand Janissaries. Corsair reinforcements under Dragut Rais pushed the total higher, into the 30,000–40,000 range that most current scholarship uses. The exact number depends on whether you count irregulars and ships' crews, and nobody agrees on that.
On the defending side, the total was somewhere between 6,000 and 9,000. About 500 to 600 were Knights of the Order. Around 3,000 were Spanish soldiers. The rest were Maltese militia and assorted mercenaries. Grand Master Jean Parisot de Valette — seventy years old, a former galley slave of the Ottomans — had spent months getting ready. Wells had been poisoned in areas the Ottomans would likely occupy. Food and ammunition had been stockpiled inside the fortified peninsulas of Birgu and Senglea, and a chain was stretched across Grand Harbour. Non-combatants were given the option of leaving for Sicily.
Fort St Elmo
The Ottoman fleet appeared off Malta's eastern coast on 18 May. By the next day, troops were coming ashore at Marsaxlokk Bay. The first target was Fort St Elmo, a star-shaped fortification on the tip of Mount Sciberras that controlled harbour access. The Ottoman command expected it to fall quickly. It took them over a month.
The garrison was small — initially a few hundred men, reinforced by volunteers who rowed across the harbour at night knowing what they were heading into. Bombardment was constant. Assaults came in waves. By the time St Elmo fell on 23 June, the Ottomans had lost an estimated 6,000 men and burned through enormous stocks of ammunition just taking one fort. Dragut was killed during this phase, struck by stone splinters from a cannonball impact, and his death mattered more than any single assault — he was probably the only commander who could have kept the fractious Ottoman leadership pulling in the same direction.
The aftermath was ugly. The Ottomans mutilated the bodies of captured Knights and floated them across the harbour on makeshift crucifixes. De Valette answered by firing the heads of Turkish prisoners from cannons into the Ottoman camp. Both sides were using terror deliberately, and neither expected quarter.
The decision to start with St Elmo has been picked over by historians ever since. It probably cost the Ottomans the siege. A month of bombardment, thousands of dead, massive expenditure of shot and powder — all for a fort that was, in the end, peripheral to the main defensive positions. Whether the decision was driven by naval requirements (Piali Pasha wanted a safer harbour for the fleet) or by overconfidence, the result was that by the time the Ottomans turned on Birgu and Senglea, they had already lost much of their advantage.
The Long Summer
With St Elmo taken, the Ottomans moved against the main positions. The next two and a half months were grinding.
On 15 July, a combined sea-and-land assault was thrown back when guns from Fort St Angelo hit dozens of Ottoman boats in the harbour, killing or drowning around 800 men. Through August, the attackers tried mining. A massive detonation under the walls on 19–21 August blew a breach wide enough that the defence should have collapsed. De Valette, sword in hand, led a counter-charge into the gap — an image that reads like hagiography, except that Balbi recorded it and Bosio confirmed it separately.
But there is a problem with the standard telling, which is that it credits the Knights almost exclusively. Mallia-Milanes calls this "historically inaccurate," and he is right. Maltese civilians repaired walls nightly and fought when breaches opened. Spanish regulars bore a large share of the actual combat. The Ottoman command was split between Piali Pasha (naval) and Mustapha Pasha (land), and the friction between them damaged coordination at critical moments. Disease may have incapacitated a quarter of the Ottoman force by late June. And the approaching end of the sailing season was putting pressure on the attackers to finish before autumn weather made a naval withdrawal dangerous. Strip away any one of those factors and the outcome might have been different.
The Siege Below the Walls
One of the more interesting developments in recent siege scholarship is the attention being paid to civilian experience, and Malta is a useful case study because the documentation is unusually good. Notarial records from Birgu and Mdina show that legal life continued under bombardment — wills, property transfers, contracts, debts acknowledged. One notary, Giuseppe Deguevara, recorded 181 deeds during the siege. These are not the kind of sources that make it into popular accounts, but they tell you things the military histories miss: what people were afraid of, what they thought would happen to their property, who they owed money to, what family arrangements they were making in case they did not survive.
The medical picture is worth a digression. The Order had always maintained hospitals — caring for the sick was the original purpose of the Hospitallers, older than their military role — and organised medical care continued even under extreme conditions during the siege. But disease, burns, crush injuries, and the psychological toll of months under bombardment compounded the combat losses heavily. The familiar casualty numbers that get repeated in popular accounts (20,000 to 30,000 Ottoman dead; roughly a third of Malta's civilian population killed) are probably in the right range, but the demographic evidence is thin enough that they should be treated as estimates. A lot of the figures trace back to sources that had reason to exaggerate in one direction or another.
The Relief
By early September, both sides were close to finished. The Ottomans had lost a third or more of their force. The defenders were running out of ammunition, food, and men fit to fight.
On 7 September, roughly 8,000 Sicilian reinforcements under Don Garcia de Toledo — the Grande Soccorso — finally landed. The relief had been promised for months and delayed repeatedly, which had generated bitter anger inside the walls. Mallia-Milanes makes the point that the Spanish force arrived when both sides "had in fact reached the same pitch of exhaustion," and the timing is hard to separate from the outcome. If Don Garcia had arrived two weeks later, or not at all, the story might be very different.
The demoralised Ottomans began pulling out on 8 September, abandoning artillery and taking further casualties as they withdrew. That date is still Malta's Victory Day, marked every year with ceremonies and regattas centred on Vittoriosa — the name Birgu was given after the siege.
The "Saved Europe" Question
The traditional claim is that 1565 stopped Ottoman expansion into the western Mediterranean and saved Christian Europe. Voltaire's remark that "nothing is better known than the siege of Malta" gets quoted in support.
The problem is that it is difficult to sustain this reading if you look at what the Ottomans did after 1565. The following year they besieged Szigetvár in Hungary — Suleiman himself died during that campaign. In 1570 they took Cyprus from Venice. They remained a serious Mediterranean naval force for decades. Lepanto in 1571 is the engagement most military historians treat as the symbolic check on Ottoman sea power, and even Lepanto did not finish them off in any permanent way.
What the siege clearly did was preserve the Order's base in Malta and make possible the physical transformation of the island. European money poured in. De Valette used it to found a new fortified city on Mount Sciberras — the peninsula where St Elmo had been so bloodily fought over — and named it Valletta. Malta's population grew from roughly 12,000 when the Order arrived in 1530 to over 80,000 by the late eighteenth century. The siege mattered enormously, but it mattered most to Malta.
Napoleon
There is an awkward coda. In June 1798, Napoleon arrived off Malta with a French fleet bound for Egypt. The Order — the same institution that had built its identity around the memory of 1565 — surrendered after limited resistance. The walls were as strong as ever.
By 1798 the Order was financially broken, and the reasons were specific. French properties had made up roughly three-fifths of its income. French knights had constituted the majority of its membership on the island. The Revolution stripped both away. Grand Master Ferdinand von Hompesch faced depleted coffers and divided loyalties, and the gap between the Order's self-image as a crusading military elite and its actual condition — underfunded, ideologically uncertain, dependent on a political order that no longer existed — was wide enough that Napoleon barely needed to test the fortifications. In 1565, de Valette commanded men who had no option other than to fight. In 1798, the men behind the same walls had plenty of options, and most of them involved not dying for an order that no longer paid their bills.
Napoleon spent six days on Malta before sailing on. French rule abolished slavery and feudal privileges and reorganised the administration. It also confiscated Church property and pressured the clergy, while requisitioning wealth for the Egyptian expedition. Within three months the Maltese revolted — less because they rejected every French reform than because the occupation was rushed and expropriatory, with open contempt for local religious life. Malta never went back to the Order. After a complicated interregnum it ended up under British control, which lasted until 1964.
The 1798 episode gets treated as a footnote to the Great Siege, but it arguably tells you more. A state built on one great military victory can coast on reputation for a long time, but reputation is not the same as institutional health. The Order had spent two centuries celebrating 1565 while gradually losing the financial base, political coherence, and shared sense of purpose that had made the defence possible in the first place. By the time Napoleon showed up, the celebration had outlived the substance.
Whether that counts as a lesson or just an observation probably depends on your tolerance for historical moralising. Either way, it is a more honest ending to the story of the Great Siege than the usual one, which stops in September 1565 and implies that the victory settled everything that came afterward.
Author Bio: John is Maltese and writes about the history, culture, and visitor experience of his island. He publishes both practical travel content and history-led articles on Malta at ManicMalta.com. Learn more on the History of Malta at ManicMalta.com/malta-history.
Sources:
Francisco Balbi di Correggio, diary (1568)
Giacomo Bosio, History of the Orde
Ernle Bradford, The Great Siege: Malta 1565 (1961)
Bruce Ware Allen, The Great Siege of Malta (2015)
Victor Mallia-Milanes, "The Siege of Malta, 1565, Revisited" and related essays
Arnold Cassola, Istanbul State Archives and Malta campaign register research
Joan Abela, notarial records
Charles Savona-Ventura, medical aspects of the siege
Emanuel Buttigieg, Order of St John studies
Maltese media coverage drawn from Times of Malta, MaltaToday, and The Malta Independent.