The Night That Taught the World How to Sink Battleships

Before Pearl Harbor, there was Taranto.

On the night of November 11–12, 1940, twenty-one British Fairey Swordfish biplanes lifted from the aircraft carrier HMS Illustrious and flew toward the Italian naval base at Taranto. They were slow, outdated, fabric-covered aircraft that looked like relics from another war.

But by morning, they had helped prove something every navy in the world would soon be forced to accept: the age of the battleship was no longer safe from the air.

The Battle of Taranto was not just a daring raid. It was the first major all-aircraft ship-to-ship naval attack in history. It showed that aircraft launched from a carrier could cripple a powerful battle fleet while it sat anchored inside what was supposed to be a defended harbor.

And Japan was watching.

Why Taranto Mattered

Taranto, on Italy’s south-east coast, had long been one of the great bases of the Regia Marina, the Italian Royal Navy. By 1940, Italy had entered the Second World War, and the Mediterranean had become a brutal contest of supply lines.

British forces in Egypt needed ships, fuel, aircraft, ammunition, and food. But moving convoys through the Mediterranean was dangerous. The Italian fleet sat like a loaded gun across the sea routes.

The British could send ships the long way around Africa and through the Suez Canal, but that was slow, exhausting, and strategically ugly. If the Royal Navy wanted freedom of movement in the Mediterranean, it had to deal with the Italian fleet.

At Taranto, the Italians had a powerful force: six battleships, cruisers, destroyers, and a heavily defended harbor. The fleet did not need to sail every day to matter. It was a classic “fleet in being”, dangerous simply because it existed.

As long as those battleships remained intact, British commanders had to plan around them.

The Strange Weapon Chosen for the Job

The aircraft chosen for the raid did not look terrifying.

The Fairey Swordfish was a slow biplane with fabric-covered wings, fixed landing gear, open cockpits, and a design that seemed almost obsolete even in 1940. Against modern fighters, it looked painfully vulnerable.

But the Swordfish had qualities that mattered at night: stability, reliability, and the ability to fly low and slow enough to deliver torpedoes with precision.

The plan had been discussed before the war. Admiral Sir Dudley Pound had ordered the idea re-examined during the Munich Crisis in 1938. Captain Lumley Lyster believed Swordfish torpedo bombers could attack Taranto at night, and training began under strict secrecy.

By 1940, Admiral Andrew Cunningham was commanding the British Mediterranean Fleet, and the plan became Operation Judgement.

The strike was originally meant to take place on October 21, Trafalgar Day. But mechanical problems, a fire involving an auxiliary fuel tank, and the loss of HMS Eagle from the operation forced a delay. Eventually, HMS Illustrious took on additional Swordfish and launched the attack alone.

A Harbor That Was Supposed to Be Protected

Taranto was not undefended.

The base had anti-aircraft guns, machine guns, searchlights, barrage balloons, and anti-torpedo nets. On paper, it was a serious defensive network.

But the defenses had holes.

Strong winds had blown away many of the barrage balloons before the raid. The anti-torpedo nets were incomplete. Worse, the nets did not reach all the way to the bottom of the harbor. That mattered because the British had prepared for exactly this problem.

Taranto’s waters were shallow, about 39 feet deep. Many naval officers believed aerial torpedoes would dive too deep after release and bury themselves in the mud. The Royal Navy solved this by modifying the torpedoes so they entered the water more shallowly, using a method that helped prevent the torpedo from plunging too deep.

That technical detail changed history.

The Night Attack Begins

Just before 9 p.m. on November 11, 1940, the first wave of twelve Swordfish took off from HMS Illustrious. A second wave followed about ninety minutes later.

The force was small. So small, in fact, that some feared it would only alert and anger the Italians without doing much real damage.

They were wrong.

The first wave reached Taranto around 11 p.m. Flares were dropped to light the harbor. Bombers attacked oil tanks and port targets. Then the torpedo aircraft came in low over the water, flying through anti-aircraft fire, barrage balloons, and searchlights.

Lieutenant Commander Kenneth “Hooch” Williamson led an attack that struck the battleship Conte di Cavour. His aircraft was shot down, and he and his observer were captured, but the torpedo had already done its work. It blasted a large hole below the waterline.

Other Swordfish attacked Littorio, one of Italy’s most powerful battleships, hitting her with multiple torpedoes. Another torpedo struck Duilio, flooding forward magazines and forcing the ship to be run aground.

The second wave arrived close to midnight, attacking through the same chaos. The Italian defenses fired thousands of rounds into the night. The sky over Taranto became a storm of tracers, flak, searchlights, and smoke.

Yet most of the British aircraft got home.

Only two Swordfish were lost.

What the Raid Did to the Italian Fleet

The damage was far out of proportion to the number of aircraft used.

Conte di Cavour was badly holed and sank into the harbor mud. She was later raised but never returned to full wartime service before Italy’s surrender.

Duilio was also badly damaged and had to be grounded to save her.

Littorio suffered three torpedo hits and heavy flooding, though she was later repaired and returned to service within months.

In one night, the Regia Marina lost half of its operational capital ships at Taranto. The next day, Italy moved undamaged ships away to Naples to avoid a repeat attack.

The Royal Navy had not destroyed the Italian navy completely. But it had changed the balance in the Mediterranean. It gave Cunningham’s fleet more freedom and showed that a carrier strike could damage a battle fleet in its own harbor.

Cunningham understood the importance of what had happened. His famous judgment still cuts through the noise:

“Taranto… should be remembered forever as having shown once and for all that in the Fleet Air Arm the Navy has its most devastating weapon.”

The Lesson Japan Studied

Taranto’s influence did not stop in the Mediterranean.

Japanese naval officers studied the raid closely. Lieutenant Commander Takeshi Naito, the assistant naval attaché in Berlin, visited Taranto and investigated the results firsthand. He later discussed his observations with Commander Mitsuo Fuchida, who would lead the attack on Pearl Harbor.

The comparison was obvious: both Taranto and Pearl Harbor involved powerful fleets anchored in shallow water. Both required aerial torpedoes to work in conditions many believed were unsuitable. Both challenged the old assumption that battleships were safest inside fortified harbors.

Japan had already been working on shallow-water torpedo techniques before Pearl Harbor, but Taranto gave the world a live demonstration. The British had shown that it could be done.

Thirteen months later, on December 7, 1941, Japanese carrier aircraft attacked Pearl Harbor.

The scale was far larger than Taranto. Japan used six fleet carriers and hundreds of aircraft. But the underlying lesson had already been written in the smoke over Italy: battleships at anchor were vulnerable to aircraft.

The End of an Old Naval Faith

The Battle of Taranto did not end the war in the Mediterranean. It did not permanently destroy the Italian fleet. Some damaged battleships returned to service, and the struggle for control of the Mediterranean continued.

But Taranto shattered a belief.

For generations, navies had built their power around big-gun battleships: armored giants meant to decide wars at sea. Taranto showed that even those giants could be humbled by aircraft launched from a moving carrier far over the horizon.

The Swordfish looked old. The strike force was tiny. The harbor was shallow. The defenses were heavy.

And still, the attack worked.

That is why Taranto matters. Not because it was the largest raid, or the bloodiest, or the most famous. It matters because it was one of those rare military moments where the future arrives before most people are ready to see it.

A handful of outdated biplanes flew into a defended harbor at night.

By morning, every battleship in the world looked a little less invincible.