In 332 BC, Alexander arrived at Tyre expecting the city to submit. Instead, its people refused to let him enter—and forced the young conqueror into one of the most unusual sieges in ancient history. Tyre’s island fortress seemed protected by both walls and water, while its ships could attack Alexander’s workers from the sea. Rather than abandon his coastal strategy, Alexander changed the battlefield itself. What followed was a seven-month contest of engineering, naval power, strategy and sheer determination that revealed exactly why he became known as Alexander the Great.
Tyre Refused to Open Its Gates
Alexander’s campaign had already brought most of the Phoenician coast under his control. Cities such as Marathos, Arados, Byblos and Sidon surrendered, weakening Persian influence along the Mediterranean. But Tyre remained defiant, protected by its unusual position offshore.
When Alexander sent word that he wanted to enter the city and sacrifice at the temple of Melqart, the Tyrians refused. They told him he could make his sacrifice at a sanctuary outside the walls, but neither Macedonian nor Persian forces would be allowed inside the city.
Alexander could have marched onward toward Egypt, but Tyre posed a serious strategic problem. As long as it remained independent, it could provide the Persian navy with an important base and leave a hostile stronghold behind Alexander’s army. Capturing it would also complete his conquest of Phoenicia and potentially bring many of its skilled sailors and ships onto his side.
There was also a political calculation. Alexander had built his reputation on victory after victory. Leaving a powerful city undefeated could encourage resistance elsewhere, particularly among Greek cities already forced into the League of Corinth. Tyre was not merely another city in his path; it was a test of whether Alexander could keep winning when the battlefield favored his enemy.
Alexander Built a Road Across the Sea
Alexander’s answer was extraordinary. His engineers began constructing a causeway, or mole, from the mainland toward the island.
Workers drove piles into the mud and packed rocks between them, using timber gathered from nearby forests to strengthen the structure. Stone was also obtained by dismantling Old Tyre, the settlement on the mainland. What began as a narrow construction project rapidly became a massive artificial road stretching toward the fortress.
At first, the Tyrians mocked the Macedonians. They had never seen an army attempt to bridge the sea in this way, and they ridiculed Alexander for daring to challenge what they considered the domain of Poseidon.
But the laughter stopped as the causeway advanced.
The deeper it reached, the more vulnerable the workers became. Tyrian archers and artillery could fire from the walls, while warships attacked the men from the side. Alexander responded by placing two large siege towers at the end of the causeway, protected with hides and equipped with missile weapons. The towers allowed his soldiers to shelter the workers while returning fire against the walls.
For a moment, his impossible plan appeared to be working.
How do you conquer an island city without a navy? Alexander the Great literally reshaped the coastline to do it! Dive into the intense strategy and brutal tactics behind. Watch the full animated breakdown now!
Tyre Burned the Siege Towers—So Alexander Started Again
The Tyrians then developed an equally creative response.
They prepared a fire ship, loading a vessel with large quantities of combustible material, pitch, tar and sulfur. Containers of naphtha were positioned so that, once the vessel caught fire, the burning liquid would intensify the flames.
The ship was then towed toward the Macedonian position. At the right moment, its crew set it ablaze and escaped overboard. Driven forward by its momentum, the burning vessel lodged against the causeway near the siege towers.
The towers became engulfed in flames.
Tyrian ships followed, destroying equipment and tearing down the defensive works that had protected Alexander’s workers. Months of effort had been severely damaged in a matter of moments.
This is where the siege reveals something important about Alexander. He did not abandon the project when the enemy found a way to defeat it. He ordered the causeway rebuilt wider, added more towers and improved its defenses.
The Tyrians had solved one version of Alexander’s problem. He simply created another version that their countermeasures could no longer stop as easily.
Then Alexander’s Enemy Gave Him a Navy
While the new causeway was being constructed, another part of Alexander’s strategy began to work in his favor.
Phoenician rulers who had once served Persia began joining Alexander as their cities fell. Ships from Arados, Byblos, Rhodes, Cilicia, Cyprus and Sidon gradually gathered under his command.
This was the opportunity Alexander needed. The man who had originally dismissed most of his navy because he believed he could not challenge the Persian fleet was now acquiring one almost by accident through his victories on land.
His fleet eventually grew to roughly 220 warships, larger than the Tyrian navy. Alexander also gained thousands of Greek mercenaries.
The siege now became something extraordinary: a fortress surrounded by an expanding fleet while an enormous causeway continued to advance from the mainland.
Tyre responded by blocking the entrances to its harbors with warships. Alexander countered by dividing his fleet and blockading the city from both sides, turning the attack into a water-borne siege.
The Final Battle Was Won by Adaptation
Alexander’s engineers mounted rams and catapults on ships and began testing different sections of the walls. The Tyrians fought back with flaming arrows, underwater attacks and obstacles designed to damage the Macedonian vessels.
Again, Alexander adapted.
His crews replaced vulnerable anchor ropes with chains, protected ships against fire and cleared obstacles from the approaches to the walls. The siege became a constant contest in which every new defensive measure was met with another adjustment.
The Tyrians eventually attempted a major surprise attack. They had noticed that many crews left their ships around noon for meals, while Alexander usually withdrew to rest at the same time.
Their timing was almost perfect.
But on that particular day, Alexander had changed his routine and was already with the fleet. When the attack began, he was in position to respond immediately. He brought additional warships around the island, while other ships blocked the southern harbor.
The Tyrian attack initially destroyed several vessels, but once Alexander counterattacked, their ships were driven back toward the harbor. The defenders had again identified a weakness—only to discover that Alexander was no longer following the pattern they had studied.
Tyre Finally Fell
The siege continued until the constant pounding of Alexander’s engines finally weakened part of the southern wall.
That breach gave the Macedonians the opening they needed.
Transport ships equipped with boarding gangways moved toward the damaged section while warships blocked the harbors. When the gangways dropped, Macedonian troops surged onto the walls.
Alexander himself was among the foremost attackers.
His personal participation in combat was a recurring feature of his campaigns. He did not simply issue orders from a distant command position; he repeatedly fought alongside his leading troops and exposed himself to the same battlefield dangers.
After roughly seven months, Tyre had fallen.
But the victory was brutal. Ancient accounts describe large numbers of Tyrians being killed and many survivors being enslaved. The precise numbers vary between sources, but the punishment was severe.
Tyre’s fall secured Alexander’s position along the Phoenician coast and opened the route toward Egypt. More importantly, it demonstrated that a fortress protected by the sea could still be conquered by an army willing to redesign the entire battlefield.
The siege of Tyre in 332 BC became one of Alexander the Great’s defining victories because he faced a fortress that neutralized his usual advantages. Unable to attack directly, he built a causeway across the sea, rebuilt his siege towers after Tyre destroyed them, assembled a powerful fleet from former Persian allies and eventually attacked from several directions. His victory demonstrated engineering, adaptability, naval strategy and personal courage, while the city’s brutal fate revealed the ruthless side of his rule. Tyre showed why Alexander could turn an impossible military problem into victory.
