Why These ‘Bizarre’ British Tanks Cracked Hitler’s Atlantic Wall on D-Day

March 1943.

A training ground near Orford Suffukk.

Villages have been quietly relocated.

The fields are scarred with concrete walls, buried mines, and replica German pill boxes.

Across this strange landscape, a procession of machines rolls forward that looks like nothing any soldier has ever seen.

A Sherman tank fitted with a spinning drum and 43 thrashing steel chains advances at walking pace, beating the Earth into clouds of dust and shrapnel.

Behind it, a Churchill tank fires a 40lb explosive charge the size of a dust bin from a stubby mortar at a concrete bunker.

The bunker splits apart.

Further back, a second Churchill drags an armored trailer and unleashes a jet of liquid fire that reaches 120 yards and sets the treeine ablaze.

Behind all of them, a 33ton Sherman floats in a flooded gravel pit held up by nothing more than a canvas screen and compressed air.

It looked insane.

It looked like a circus of war machines designed by a madman.

Within 15 months, these machines would lead the largest amphibious invasion in history.

They would breach fortifications that no conventional tank could touch.

On the beaches where they fought, casualties would be a fraction of those where they were absent.

They would go on to fight from the Shelt to the Rine, from the Reichfeld Forest to the Ela, equipping the largest division in the British Army with nearly 7,000 vehicles.

They were called Hobart’s funnies, the specialist armor of the 79th Armored Division, and they were the most important weapons the Allies brought to Normandy.

To understand why these machines existed, you need to understand the disaster that created them.

On August 19, 1942, 6,000 Allied soldiers, mostly Canadian, stormed the French port of DEP in Operation Jubilee.

It was a catastrophe.

Without specialist armor to breach seaw walls, clear minefields, or destroy concrete bunkers, the infantry was slaughtered on the beach.

Churchill tanks landed but could not cross the shingle.

Engineers trying to blow obstacles by hand were cut down in the open.

Of the 6,000 who sailed, nearly 4,000 were killed, wounded, or captured.

The lesson was brutal and unambiguous.

Conventional forces could not crack a fortified coastline.

The man chosen to solve this problem was Major General Percy Hobart.

He was an unlikely savior.

In 1938, Hobart had built the seventh armored division in Egypt, the legendary Desert Rats, pioneering radio coordination between tanks and tactical air power.

His ideas were so advanced that German General Hines Gudderion paid from his own pocket to have Hobart’s articles translated, then used them to develop the Panza tactics that conquered France.

But Hobart was impossible to work with.

Superiors called his command the mobile farce.

In early 1940, General Waveville sacked him into forced retirement.

The pioneer of British armored warfare was reduced to serving as a lance corporal in the home guard, defending a Cotswwell’s village with sharpened scaffolding poles.

In August 1940, Winston Churchill discovered Hobart’s humiliation and was furious.

He ordered his immediate reinstatement, writing to the War Office that Britain could not afford to confine Army appointments to officers who had excited no hostile comment in their career.

The final rescue came in March 1943 when the chief of the Imperial General Staff offered Hobart the 79th Armored Division, a formation marked for disbandment.

Its new mission, born directly from the DEP disaster, was to develop specialist armored vehicles capable of breaching any fortified beach in Europe.

Hobart attacked the problem with obsessive energy.

He covered a,000 m per week visiting testing sites across Britain.

He built replica German defenses and systematically destroyed them.

He ordered every swimming tank driver to complete six successful sea launches before being cleared for operations.

In the three months before D-Day, his men completed approximately 30,000 training launches.

The vehicles themselves were extraordinary.

The duplex drive Sherman designed by Hungarian engineer Nicholas Straussler was a standard 33ton tank fitted with a tall waterproof canvas screen supported by 36 inflatable rubber tubes.

When raised, the screen displaced enough water to float the tank with 3 ft of freeboard.

Twin propellers at the rear drove it at four knots.

From a distance, it resembled an oversized rowing boat.

Once ashore, the crew collapsed the screen in seconds and fought as a normal tank with its 75 mm gun.

The concept was brilliant but terrifying.

Designed for waves of 1 ft or less.

Anything higher risk drowning the crew, the Sherman Crab carried a rotating drum on extended arms at the front.

43 chains, each ending in a steel ball, spun at 142 revolutions per minute and beat the ground to detonate buried mines.

Crabs advanced at 1 and a/4 mph while flailing, clearing a 10-ft wide path.

They operated in groups of five with two providing covering fire while three cleared the lane.

The Churchill AVRE replaced its standard gun with a petard spigot mortar that fired a 40lb demolition charge.

Effective range was just 80 yards, forcing crews to drive almost point blank into enemy fortifications before firing.

The charge could crack open concrete bunkers, flatten pill boxes, and destroy seaw walls.

Reloading required the co-driver to open his hatch and manually insert a fresh round while exposed to enemy fire.

180 were ready by D-Day.

The Churchill crocodile was the weapon the Germans feared most.

A flame projector replaced the hull machine gun.

Fed by an armored trailer carrying 400 g of thickened fuel, it could project a jet of fire 120 yd.

The weapon was so terrifying that British crews developed a tactic called the wet spray, firing unlit fuel as a warning.

It was usually enough to trigger immediate surrender.

Captured crocodile crews were sometimes executed by the Germans on site.

Beyond these four, Hobart fielded an entire managerie.

Bobin tanks unrolled reinforced fabric carpets over soft sand.

Churchill arcs drove into ditches and became ramps while the crew stayed inside as other tanks drove over them.

Facine carriers dropped bundles of brushwood into craters.

Assault bridges launched 34 ft spans in 30 seconds.

Now before we get into where these machines actually fought.

If you are enjoying this deep dive into British wartime engineering, hit subscribe.

It takes a second, costs nothing, and helps the channel grow.

June 6th, 1944, D-Day.

The 79th Armored Division never fought as a single formation.

Its vehicles were parcled out in tailored breaching teams.

Each a mix of crabs, AVREs, DD tanks, and bulldozers assigned to specific beach sectors.

The results were devastating.

On Gold Beach, the British 50th Infantry Division landed at 0725 supported by Sherman Crabs of the Westminster Draons and Churchill VREs of the 81st and 82nd Assault Squadrons.

The most stubborn German position was La Haml, where a case-mated 75mm gun survived aerial bombardment and continued firing for nearly 9 hours.

At 1600, an AVRE of the 82nd Assault Squadron fired a Patard round into the bunker’s rear entrance and silenced it for good.

Lance Sergeant HM Sca used his patard against a concrete pillbox, and according to his citation, one dustbin was sufficient to demoralize the whole crew.

He was awarded the Distinguished Conduct Medal.

By nightfall, 25,000 men had landed at Gold with roughly 400 casualties 6 mi inland, the deepest British penetration on D-Day.

On Juno Beach, the Canadian Third Infantry Division hit the shore, supported by DD Shermans of the first two.

Corsel Sumere was the most heavily fortified position on any Angloanadian beach.

19 DD tanks launched from 2,000 yd.

14 reached the shore and engaged the German guns at 200 yd, knocking out an 88 mm, a 75 mm, and 350 mm positions with direct fire.

Sergeant Leo Gary commanded one of the first DD Shermans through the town and became a local hero.

Decades later, a recovered DD tank was installed in the square that now bears his name.

Canadian casualties totaled roughly 960 to,200 with a third of those in the first hour.

On Sword Beach, the 13th 18th Royal Har launched 34 DD Shermans from 5,000 yards out.

31 reached shore.

By 09:30, Crabs and Avres had cleared seven of eight exit lanes from the beach.

At Strong Point Hillman, a massive fortified complex held by 150 Germans.

Captain RG Riley was killed leading the first assault.

Private JR Hunter earned the Distinguished Conduct Medal for reducing bunkers individually, becoming known as Bunker Hunter.

The contrast with Omaha Beach is the most debated aspect of Hobart’s legacy.

In early 1944, Hobart demonstrated his vehicles to Generals Eisenhower and Bradley.

Montgomery offered roughly a third of the funnies to the Americans.

Bradley declined everything except the DD Sherman.

The consequences were devastating.

The 741st Tank Battalion launched 29 DD Sherman’s 6,000 yd from shore into waves of 4 to 6 ft, far beyond the design limit of 1 ft.

27 of 29 sank.

Only two reached shore under their own power.

Without crabs, engineers cleared mines by hand and died doing it.

Without AVREs, concrete bunkers pinned down infantry for hours.

American casualties at Omaha reached roughly 2,000 to 3,600 against 400 on gold and 600 to 1,000 on sword.

Modern historians rightly note that Omaha was the most heavily defended beach garrisoned by the veteran 352nd Infantry Division and that the American aerial bombardment missed entirely due to cloud cover.

Utah Beach, also American and also without funnies, suffered only 197 casualties.

The picture is more complex than the simple narrative allows, but Eisenhower himself stated that the light casualties on all beaches except Omaha were in large measure due to the specialist vehicles.

The Funnies fought far beyond D-Day.

By January 1945, the 79th had grown to 21,000 men, the largest division in the British Army.

Buffalo fied troops across the flooded shelt.

Crocodiles assaulted Seagreed line bunkers during Operation Veritable during the Rine Crossing in March 1945.

600 buffaloos made over 3,800 trips in 3 days, fing divisions across the river with only 38 casualties.

Winston Churchill himself crossed the Rine in a Buffalo and congratulated the crews.

The division was disbanded on August 20, 1945, having sustained roughly 1500 killed, wounded, or missing.

Today, the AVRE concept continues in the Trojan based on the Challenger 2.

The Titan bridge layer carries on the Churchill Ark tradition.

Mine flailing vehicles, armored bulldozers, and combat engineer tanks worldwide trace their lineage to Hobart’s machines.

Surviving vehicles sit at the tank museum in Bovington, including the only DD Sherman in the world with its original canvas screen still intact.

March 1943, a training ground near Orford Suffukk.

A procession of impossible machines rolls across a scarred English field.

A flailing tank beating the earth with chains.

A mortar tank throwing dust bins full of explosives.

A flamethrower dragging a trailer of liquid fire.

A 33-tonon tank floating on canvas and compressed air.

They were [clears throat] underpowered in places, fragile in others, limited in range and dependent on calm seas.

And yet they worked on the beaches of Normandy, in the flooded boulders of the Shelt, across the Rine under fire and through the Zeke freed line.

The man who built them had been sacked by his own army and left sharpening poles in the home guard.

The doctrines he invented were stolen by the enemy and used to conquer Europe.

Then he built the machines that smashed through the defenses those stolen doctrines had created.

That is not luck.

That is not coincidence.

It’s not.