The ‘Gutted’ British Tank With No Turret That Changed How Every Army Moved Infantry Into Battle

August 1944, a Royal Canadian electrical and mechanical engineers workshop somewhere behind the can sector, Normandy.

250 men work through the night under canvas and ark light, ripping the 105mm howitzers out of Americanbuilt M7 priest self-propelled guns.

The gun mantlets come off, the ammunition bins come out, steel plate scavenged from wrecked tanks on the beaches, and a recently liberated French steel works is welded over the gaping holes where the weapons used to sit.

What rolls out of that workshop looks like a mistake.

A tank hull with no turret, no main armament, an open top, and a single machine gun bolted to a ring mount where a howitzer once stood.

It looked gutted.

It looked broken.

Officers who saw it for the first time assumed it was a wreck being towed to a scrapyard.

Within 72 hours, 76 of these vehicles would carry infantry into the largest mechanized assault the Allied armies had ever attempted.

Within nine months, an entire regiment of them would transport troops from 58 different infantry battalions across northwest Europe from the beaches of Normandy to the streets of Hamburg.

Within a generation, every army on Earth would adopt the principle these crude machines had proven.

They were called kangaroos, and they were the world’s first armored personnel carriers.

To understand why the kangaroo existed, you need to understand the catastrophe the Canadian Army faced in the summer of 1944.

In the weeks after D-Day, Canadian infantry in the can sector were being destroyed at a rate that threatened to break entire divisions.

The third Canadian infantry division suffered nearly 3,000 casualties in its first week of fighting.

The broader Normandy campaign would cost Canada more than 18,000 casualties, including over 5,000 killed.

The bloodiest single day came on July 25, 1944, Operation Spring.

The Black Watch, Royal Highland Regiment of Canada, attacked Vere’s Ridge in daylight against entrenched SS Panza divisions.

In fewer than 4 hours, the battalion lost 300 of 320 men.

Total Canadian casualties that day exceeded 1500.

It was the worst single day loss for Canada since DB.

The problem was not courage.

The problem was physics.

Infantry advancing on foot across open ground, even behind a barrage, could not survive the density of German machine gun fire, mortars, and pre-registered artillery in the KHN sector.

The available transport offered no solution.

Universal carriers carried only four or five men behind 10 mm of armor that stopped nothing heavier than a rifle round.

M3 tracks were desperately needed by American formations and carried just 12 mm of protection.

Unarmored trucks were suicide in the forward zone.

Meanwhile, dozens of surplus M7 priest self-propelled guns sat idle in rear areas, replaced by towed 25 pounders.

Their howitzers were gone, but their hulls remained intact, wrapped in 51 mm of cast steel armor, sitting on fully tracked chassis with continental radial engines still running.

Lieutenant General Guy Simons, commanding the second Canadian Corps, saw the asymmetry and seized it.

He declared it essential that infantry must be carried in bulletproof and splinterproof vehicles to the actual objectives.

Strip the guns, keep the armor, put soldiers inside.

The conversion was one of the war’s most extraordinary engineering feats.

On July 31, 1944, the order came down.

Lieutenant Colonel Carl Bow of the Royal Canadian Electrical and Mechanical Engineers estimated 3 weeks.

He was given 7 days.

Major George Wigan of the Royal Canadian Ordinance Corps assembled 250 men from 14 different workshop units and began stripping priests around the clock.

Steel plate was sourced from extraordinary places, wrecked tank hulls in boneyards across Normandy, the Schneider steel works in recently liberated Khn, damaged landing craft rusting on the invasion beaches, even captured German welding rod.

When test firing revealed that heavy caliber rounds could punch through single mild steel plates, engineers created a sandwich of doubled layers filled with sand.

28 engines were replaced outright.

Every remaining power plant received a compressed 100hour overhaul.

On August 3, a prototype was driven to second core headquarters.

Simons inspected it personally.

Major Gilpointer suggested the name kangaroo because troops would be protected in mommy’s pouch, replacing the initial nickname defrocked priests.

By August 6, 76 kangaroos stood ready.

Each carried 10 infantrymen plus a driver.

The retained 50 caliber Browning machine gun provided defensive fire from the anti-aircraft pullpit.

Roughly 60% kept their number 19 wireless set radios.

7 days from concept to combat readiness, 250 men, 76 vehicles, zero official procurement channels.

It was improvisation on an industrial scale.

Now, before we get into where the kangaroo actually fought and what it proved on the battlefield, if you are enjoying this deep dive into wartime innovation and British military engineering, hit subscribe.

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The night of August 7 to8, 1944.

Operation Totalize, south of KH.

Two massive assault columns, four vehicles wide, rolled toward files along a four-mile corridor.

tanks, kangaroo APCs, self-propelled anti-tank guns, and mine flail tanks advanced behind a RAF bomber command saturation strike on the German flanks.

The 76 kangaroos were split between the 51st Highland Division on the east and the second Canadian Infantry Division on the west.

The results were transformative.

Infantry dismounted from kangaroos within 200 yards of their objectives at Cremanil and Santon de Cranil.

They overran the defenders before the Germans could reposition.

The casualty comparison between mounted and dismounted battalions in the same operation became the single most important data point in the history of armored warfare doctrine.

The battalions riding in kangaroos, the Royal Regiment of Canada, the Royal Hamilton Light Infantry, the Essex Scottish suffered a combined seven killed and 46 wounded.

The battalions advancing on foot across the same ground.

The Cameron Highlanders of Canada, Leuzilier Mondroel, the South Saskatchewan Regiment.

The Calgary Highlanders suffered 68 killed and 192 wounded.

The dismounted infantry lost nearly 10 times as many killed and four times as many wounded as those protected inside tank holes.

That single night ended the argument.

The priest kangaroos were a stop gap.

Worn out American engines and borrowed chassis could not sustain a permanent capability.

On August 10, Canadian military headquarters in London ordered the conversion of 100 Ram Mark II cruiser tanks at number one Canadian base workshop, Bordon Camp, Hampshire.

The RAM was an obsolete Canadian designed training tank built on the American M3 medium chassis.

Removing the turret reduced weight from 29 tons to approximately 24, lowered the silhouette by 3 feet, and created genuine space for 10 to 11 fully equipped infantrymen.

The cast hole retained 51 to 76 mm of frontal armor, 32 to 64 on the sides, and 38 at the rear.

A Continental R975 radial engine producing 400 horsepower pushed the vehicle to 25 mph with a range of 144 mi.

Conversions ran at 15 per day.

By war’s end, approximately 500 Ram Kangaroos had been completed.

On August 28, 1944, the first Canadian armored personnel carrier squadron was formally established under Lieutenant Colonel Gordon Churchill, a World War I veteran of the Fort Gary Horse.

55 priest kangaroos, 131 personnel, four troops.

By October, the squadron expanded into the first Canadian armored carrier regiment and was assigned to Major General Sir Percy Hobart’s 79th Armored Division, the famous Hobart’s Funnies.

It was the only Canadian regiment in that formation.

From there, the kangaroos fought without pause.

At La Hava in September 1944 during Operation Estonia, Ram kangaroos carried infantry through the outer defenses of the fortress port.

At Bolognian Calala, they breached minefields and delivered assault troops to fortified positions.

During Operation Veritable in February 1945, the Sixth Battalion King’s own Scottish borderers rode kangaroos across anti-tank ditches east of Frasel in conditions so appalling that the 8-hour journey from Neiman was later described as a remarkable display of skill and endurance by the APC drivers.

In the same operation, the Royal Winnipeg rifles approached the village of Louisendorf in kangaroos, dismounted within 50 yards of the enemy and took 240 prisoners in close quarters fighting.

During Operation Blockbuster in February and March 1945, infantry of the sixth brigade advanced in three columns behind a 345 barrage.

Trooper Colin Mcmecken of the First Canadian Armored Carrier Regiment later recalled that in some battles, enemy fire was so intense that infantry could not disembark.

They shot directly from the kangaroos, turning them into moving bunkers.

On March 26, 1945, the regiment became the first Canadian armored unit to cross the Rine during Operation Plunder.

In the final weeks, kangaroos ranged across northern Germany and into the Netherlands.

The Stormmont, Dundus, and Glengarry Highlanders rode kangaroos into Leoan on April 16.

The last combat use came with the Seventh Armored Division’s entry into Hamburg on May 3, 1945.

Not every engagement was a triumph.

On March 30, a Kangaroo squadron supporting the 53rd Welsh Division ran into a dedicated anti-tank screen and lost eight vehicles.

The Kangaroo’s armor stopped bullets, shrapnel, and mortar fragments.

It could not stop an 88 mm gun or a panzer at close range.

Crews and passengers knew the difference.

Through 9 months of continuous operations, the regiment carried infantry from 38 British and 20 Canadian infantry regiments and earned 15 battle honors.

The unit’s own crews suffered 17 killed and 71 wounded.

The Kangaroo’s most remarkable legacy is that no purpose-built armored personnel carrier has ever matched its level of protection.

The Ram Kangaroo’s 51 to 76 mm of cast steel provided four to six times the frontal protection of the American Mond, the most produced APC in history.

The postwar Churchill Mark 7 Kangaroo converted from 1949 onward with 152 mm of frontal armor offered roughly 10 times the equivalent protection.

Every APC that followed the American M13, the British FV432, the Soviet BTR60 deliberately traded armor for speed, weight savings, amphibious capability, and cost efficiency.

On paper, these lighter vehicles looked superior.

In practice, their thin skins meant infantry died when hits landed.

The M3 halftrack in World War II, the M113 in Vietnam, the BTR in Afghanistan, all demonstrated the same vulnerability the Kangaroo had been built to solve.

One Nation learned the lesson permanently.

Israel, after suffering catastrophic infantry losses in armored personnel carriers during the 1973 Yamipa War, returned to the Kangaroo principle.

The Asharit fielded in 1988 stripped captured Soviet T-54 and T-55 tanks of their turrets and converted them into heavy APCs carrying seven infantry behind tank level armor.

About 500 were built.

The Neymar built on the Macava main battle tank chassis carries the concept to its logical conclusion as a purpose-designed heavy APC with protection exceeding most main battle tanks.

The Kangaroo’s lesson that heavy armor saves infantry lives echoes in every Israeli APC design.

The first Canadian armored carrier regiment was disbanded at 2359 hours on June 20, 1945 at Penheim, Germany.

It was the only Canadian regiment to be formed and disbanded overseas without ever setting foot on home soil.

Its existence had been classified as secret under the 79th Armored Division security protocols.

Recognition came slowly.

Formal acknowledgement arrived on September 10, 2011 when the 31 combat engineers accepted the regiment’s battle honors and Guidedon bearing the motto Armatos Fund, bringing forth the armed.

A ram kangaroo designated Marian II survives at the Canadian War Museum in Ottawa.

Restored to running condition, the tank museum at Bovington holds both a ram and a Churchill kangaroo in the village of Mil, Netherlands, where the regiment was formally founded in October 1944.

A ram kangaroo stands as a permanent monument on the Langan Boom commemorating the young Canadians who fought there.

August 1944, a workshop behind the Khn sector.

250 men welding scavenged steel onto gutted tank holes with captured German welding rod.

The Kangaroo had no turret.

It had no main arament.

It had an open top that left its passengers exposed to air bursts and mortar fire.

It was slow, crude, and built from scraps on a 7-day deadline with zero official procurement.

And yet, it worked.

It worked in the wheat fields south of Kr.

It worked in the fortified channel ports.

It worked in the frozen mud of the Reichfald.

It worked crossing the rine under direct fire.

It worked in the rubble of German cities in the final days of the war.

The men who rode inside kangaroos suffered 17th the casualties of those who walked the same ground on foot.

That was not a marginal improvement.

That was a revolution.

Every armored personnel carrier in service today in every army on Earth exists because Canadian engineers working with wrecked steel and borrowed welding rod proved in 7 days what decades of peaceime planning had failed to deliver.

You do not need a perfect vehicle.

You need a vehicle that keeps soldiers alive long enough to fight.

That is