Cautionary Tales with Tim Harford - Can You Make a Sherman Tank Float?

Episode Date: May 29, 2026

It’s D-Day and the Allies are about to invade Nazi-occupied France. For the landings to succeed, American soldiers on Omaha Beach will have to break through some formidable coastal defences - Hi...tler’s Atlantic Wall. Sherman tanks will come in very handy - and the Allies have come up with a novel solution for getting them to the beach. These tanks will swim. Everyone from Winston Churchill down thought swimming tanks were a great idea… but were they?  For a full list of sources, see the show notes at ⁠timharford.com⁠See omnystudio.com/listener for privacy information.

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Starting point is 00:00:00 This is an IHeart podcast. Guaranteed human. Run a business and not thinking about podcasting. Think again. More Americans listen to podcasts than adds supported streaming music from Spotify and Pandora. And as the number one podcaster, IHearts twice as large as the next two combined.
Starting point is 00:00:15 Learn how podcasting can help your business. Call 844-844-I-Hart. Pushkin. D-Day has dawned. Under gray brooding skies, on gray storm-tossed seas, Thousands upon thousands of grey warships are descending on the French coast. Ahead lies a broad ribbon of yellow sand.
Starting point is 00:00:54 Code-named Omaha Beach by the Allied military planners. In happier times it was a magnet for vacationers. But now the gently sloping sands are strewn with explosive mines, barbed wire and fearsome metal obstacles, designed to rip apart any boat trying to land. Verdant green hills rise behind the beach, and hidden amongst their folds are trenches, machine gun nests, and cannon emplacements.
Starting point is 00:01:26 This is Hitler's Atlantic War, part of the 3,000-mile chain of fortifications built from the Spanish frontier to the Arctic tip of Norway. The Nazis have sunk vast sums of money, billions into the project with just one aim to stop any allied invasion dead in the serf. The battleships offshore are hammering these fortifications with their big gums, but while the Germans are many things, they're not stupid.
Starting point is 00:02:04 Their pillboxes are angled to make them impervious to these shells, whilst still giving the defenders inside a perfect sight line to shoot left. and right along Omaha Beach. H hour is approaching, and when the first American troops storm ashore, they'll be at the mercy of this withering barrage. Running across hundreds of yards of open sand under German fire will be a task as murderous as anything seen in World War I.
Starting point is 00:02:37 The death toll could be enormous. And that's where an unlikely, secret weapon comes in. We're aboard a landing craft with men of the 741st Tank Battalion. These tank crews are scheduled to hit the beach ahead of the infantry, with orders to train their cannon on the German defenders, knocking them out before they can annihilate the poor foot soldiers following behind. The 741st tanks won't be arriving by landing craft, though. In a cunning twist, these tanks will swim into battle all by themselves. The Germans have never seen anything like it.
Starting point is 00:03:26 In the water, our tanks look just like small boats, says tank crewman, private Bill Merkert. We'll be a big surprise for the Germans when we come out of the surf. These special tanks are able to swim thanks to a set of propellers and a flimsy-looking canvas scream allowing them to float. It's taken a huge effort to make these Sherman tanks seaworthy. But Allied generals think it's the best way to reduce bloodshed on the invasion beaches. But can you ever really make a 33-ton tank seaworthy? Even by the standards of the English Channel,
Starting point is 00:04:13 D-Day, June the 6th, 1944 is something of a washout. It's the worst summer weather in memory, and more akin to the storms of winter. The sea's pretty heavy, notes Bill Merkert aboard his DD tank. He never practiced in this kind of weather. But more than three miles from shore,
Starting point is 00:04:38 a yellow signal flag still goes up. The landing craft drops its ramp, and Bill's Sherman Tank clatters forward and into the waves. I'm Tim Harford, and you're listening to another cautionary tale. The tank was a defining weapon of World War II. German panzers had defeated Poland in the first weeks of the conflict, then rolled across Western Europe. These clanking, clattering guns on tracks had bested the mighty French army
Starting point is 00:05:41 and thrown the British back into the sea. The blitzkrieg tactics of Hitler's tank commanders had taken them to the gates of Moscow and had very nearly swept the British out of North Africa. It was all very annoying for Prime Minister Winston Churchill. During the First World War, he'd been in charge of the Royal Navy and had diverted a fraction of its immense budget
Starting point is 00:06:07 to fund the building of so-called landship. These weren't ships at all, rather they were primitive tanks. And thanks to forward thinkers such as Churchill, the British had enjoyed an early lead in the development of armoured warfare. But this foundational work was regrettably squandered at war's end. The defeated Germans were keen to learn all about the tanks that had helped seal their fate. But the British officer class preferred to return to a more traditional way of war. waging war, one involving stirrups and swords and big, beautiful horses. That neglect has robbed us of all the fruits of this invention, lamented Churchill in the darkest
Starting point is 00:06:56 days of World War II. These fruits have been reaped by the enemy with terrible consequences. Churchill adored adventures and adventurers. He loved bold skis. He loved bold skis. He loved bold, themes and unorthodox thinkers, almost to a fault. Angered that his army had been left behind in the tank race, the new Prime Minister decided to back his hunch and promote one Percy Clegghorn, Stanley Hobart. Hobart was a 56-year-old Lance Corporal in the Home Guard, a rag-tag army of old men and teenage boys
Starting point is 00:07:37 who guarded against Nazi invasion in their spare time, occasionally armed only with carving knives tied to broomsticks. Of course, Hobart hadn't always been a lowly Lance Corporal, he'd been a major general in the regular army, and a fanatic about tanks. He wrote about them, he talked about them, and finally badgered his superiors into giving him command of a new tank brigade to test his theories.
Starting point is 00:08:07 The German High Command rather admired his work, copying his ideas, so much so that after one panzer exercise, it was said to have raised a champagne toast in his honour. To Hobart! Hobart's fellow British officers, however, found his dedication to armoured warfare rather tiresome. Hobo was drummed out of the army, and his many enemies in the general staff
Starting point is 00:08:36 fought fiercely any campaign to bring him back. Winston Churchill was not, however, a man to accept defeat, so he wrote to the chief of the Imperial General Staff. This is a time to try men of force and vision, and not to be exclusively confined to those who are judged thoroughly safe by conventional standards. Will you kindly make sure the appointment is made at the earliest moment? Further plots were hatched to have Hobart pensioned off,
Starting point is 00:09:14 but he survived them all, and eventually found himself in charge of a unit that was pretty experimental, even by his standards. The 79th Armoured Division was unique. Its role was to develop and deploy on the battlefield, tanks capable of quite remarkable feats. Feats all intended to allow the Allies to crack, Hitler's Atlantic Wall and invade Europe.
Starting point is 00:09:43 If there was a minefield in the way, Hobart had a tank which was fitted with a rotating drum of chains to flail the ground and clear the explosives. If the Nazis had dug a deep anti-tank ditch and the 79th could bring up a tank carrying its own section of bridge, Hobart had tanks for every job imaginable, able to blast and burn and generally overcome anything Hitler's invasion beaches had to offer. These vehicles became known as Hobart's Funnies, and of course included a swimming tank.
Starting point is 00:10:22 The idea of a swimming tank had been floating around for decades, but under a cloak of secrecy, the British now perfected the concept. Well, almost. To stay afloat, D.D. or Duplex Drive tanks had to displace a weight of water greater than their own weight. To achieve this buoyancy, a tall canvas screen was erected right around the vehicle, held in place by metal struts and inflatable rubber tubes. Even so, the vehicles still rode worryingly low in the water. To our eyes, D.D. tanks seem to our eyes. D.D. tanks seem to. precarious, even a little mad. The Sherman's looked a bit like they were hiding at the bottom of a big
Starting point is 00:11:15 canvas bucket, but they seemed to have impressed the British top brass. Since D-Day was to be a combined Anglo-American effort, Churchill and Hobart needed some American buy-in. Hobart had overseen many thousands of practice launches of swimming tanks with just a single sinking. So, He set up a demonstration for his American counterparts. The US generals turned their noses up at Hobart's other funnies, his flamethrower tanks and bridge layers, but they rather liked the DD. They were fearful that if a German shell struck a landing craft on D-Day,
Starting point is 00:11:57 then four tanks would be sunk in one go. Swimming tanks, being harder to hit, seemed to solve this problem. The American generals instructed Washington to approve the immediate construction of hundreds of the contraptions and gave them a triple A priority rating. That's the same rating as the atomic bomb, a sign of the high hopes many had for the DD tank and the importance they placed on it. Now that swimming tanks were rolling off the production lines,
Starting point is 00:12:33 training could begin in earnest. Exercise Smash was scheduled for April 1944 and would be a rehearsal as close to battle conditions as possible, complete with the firing of live ammunition. Under the gaze of Winston Churchill, General Eisenhower and King George, a force of D.D. tanks swam towards a deserted English beach. We knew we weren't going to make it. said one of the tank commanders.
Starting point is 00:13:09 Winds in the English Channel that day were reaching force four, and the waves were a metre high, causing the commander to eye the canvas screen around his tank nervously. A great wave crashed over the top, he said, and we sank to the bottom. Six tanks were lost on exercise smash, and six men drowned. A seventh tank got stuck on a sandbar
Starting point is 00:13:41 and was abandoned by its crew. It then refloated and began drifting out to sea. Fearing it might float off and be discovered by the Germans, the Royal Navy blew it to pieces. In the choppy waters of the channel, it was no small thing to turn a tank into a boat. Nor was it straightforward to turn soldiers. into sailors.
Starting point is 00:14:10 Cautionary tales will return shortly. Media and women are looking for more. More to themselves, their businesses, their elected leaders, and the world are out of them. And that's why we're thrilled to introduce the Honest Talk podcast. I'm Jennifer Stewart. And I'm Catherine Clark. And in this podcast, we interview Canada's
Starting point is 00:14:31 most inspiring women. Entrepreneurs, artists, athletes, politicians, and newsmakers, all at different stages of their journey. So if you're looking to connect, and we hope you'll join us. Listen to the Honest Talk podcasts on IHeart Radio or wherever you listen to your podcasts. Run a business and not thinking about podcasting, think again.
Starting point is 00:14:51 More Americans listen to podcasts than ad-supported streaming music from Spotify and Pandora. And as the number one podcaster, IHeart's twice as large as the next two combined. So whatever your customers listen to, they'll hear your message. Plus, only IHeart can extend your message to audiences across broadcast radio. Think podcasting can help your business. Think IHeart. streaming, radio and podcasting. Call 844-844-I-heart to get started.
Starting point is 00:15:15 That's 844-8-4-I-heart. On D-Day, the seas off Omaha Beach were running, if anything, even higher than they had during the ill-fated exercise smash. Following those sinkings in April, the U.S. Navy thought it had been agreed that the D-D tanks would only be launched weather-permitting. and that the tank crews would heed the advice of its sailors before venturing out into the winds and the waves and the wicked tide.
Starting point is 00:15:52 Sadly, it was never set out what happened if the soldiers and sailors disagreed. Aboard the ships carrying the DD tanks of 741st Battalion, the most senior sailor, thought it was obvious that the sea was too choppy, But the army officers looked at the same rolling waves and decided they'd take the risk. Everyone from Churchill down clearly thought the D-D tank was a splendid idea.
Starting point is 00:16:25 And after all the trouble and training, were the officers of the 741st really going to give up now because of a few waves? They had a job to do. On other D-Day beaches, and even further along Omaha Beach, naval commanders were successfully arguing that it was folly to launch the D-D tanks,
Starting point is 00:16:55 so their landing craft were taking the armour right up to the shore. But Private Bill Merkert and his comrades in the 741st were ordered to set their propellers spinning and swim the three miles or more to shore. The swell was really big, Bill remembered, One moment you'd ride a crest and get a view of the beach. The next, you'd be at the bottom of a trough and just see water all around you. The D-Day plans were meticulous, calling for Bill's tank to land at a specific spot on Omaha Beach.
Starting point is 00:17:35 In calm weather, this would have been no cinch. But against the seas that day, even an experienced sailor would have struggled. The D-D tanks soon found. themselves being swept off course, so the crews desperately steered their craft to fight the wind and currents. But this was a mistake no seasoned mariner would have made, because by doing so, the tanks only exposed their vulnerable sides to the butting waves. The struts holding up the canvas screen started to buckle, Bill recalled. He'd been standing atop his Sherman. I was bracing struck, but I was in no doubt we were in serious trouble. He was soon proved correct.
Starting point is 00:18:23 We were the first tank to sink. It went straight down with a big gulp, dragging a couple of guys down with it. Twenty-six other tanks soon followed bills to the bottom. Some soldiers bobbed free in the chilly waters, but others sank with their vehicles. Bill Merkert dragged himself into a half-inflated life-arm to await rescue and reflected on the squandering of merely half of the entire DEDY force. That lost firepower could have made a big difference to the soldiers fighting on Omaha, he concluded. Nineteen-year-old Sergeant Ben Franklin was one of those soldiers
Starting point is 00:19:11 wading through the surf and sorely missing the support of a Sherman-Taltern. The machine gun bullets were hitting everywhere. I was scared to death and there was nothing I could do but duck under the water when they came close and hold my breath as long as I could. The young infantryman reached dry land, but with so few tanks to blast the German pillboxes and machine gun nests, he faced a daunting sprint up the exposed beach. In his bunker on the hill above,
Starting point is 00:19:43 German private Franz Gokl was able to train his machine gun on GIs like Ben Franklin, safe from attack by a Sherman. The Americans had a lot of beach to cross. As they swarmed towards me, I opened fire. The Americans fell and many never stood up again. I don't know how many I'd killed. The lack of armour on that section of beach is blamed for the invasion there, grinding. to a halt, with the generals out to sea pondering the idea of abandoning bloody Omaha altogether and sending reinforcements to beaches where their tanks had more successfully cut a swath through
Starting point is 00:20:30 Hitler's defences. That didn't happen. The attacking troops on Omaha Beach slowly but surely knocked out one German strong point after another. The Atlantic War was a war. The Atlantic War, had cost Nazi Germany a fortune to construct, but had held up the Allies for a few hours and most. So the sinking of the 741st's D-D tanks didn't lose the Allies the Battle of Omaha Beach. That fight was won, but at a terrible and perhaps needless cost in lives.
Starting point is 00:21:15 One wonders why the concept of amphibious tanks was ever seriously entertained in the first place, let alone given top secret triple A priority, soaking up resources and manpower badly needed elsewhere. Here's the thing about DD tanks, historian John McManus told the We Have Ways podcast. They solved a problem that didn't really exist. We'd already worked out how to bring tanks ashore.
Starting point is 00:21:47 He's right. An official army report said the D-D tank was not satisfactory for the purpose intended. It noted that up and down the D-Day beaches, the Navy had successfully delivered tanks where they needed to be without significant losses to German artillery. The fear that the fleet of landing craft would be decimated proved unfounded. It was, ironically, the Swim In that wiped out many of the vital tanks. Zach Morris, author of When the Beaches Trembled, notes that in the war against Japan and the Pacific,
Starting point is 00:22:32 where, incidentally, D.D. tanks had been rejected. The US Navy had instead equipped small landing craft with tank cannon. Thus armed, they could sail close to shore and bring those guns to bear on the enemy. Morris says, the D-Day planners were thinking, how can we make a floating tank? They were asking the wrong question. It should have been, what can we take that already floats and make it into a tank? This all rather reminds me of milkshakes.
Starting point is 00:23:09 Yes, you heard that correctly. Harvard Business School professor Clayton Christensen used the example of milkshakes to illustrate how people often set off down the road to solve the wrong problem. Christensen told of a fast food chain wanting to boost its milkshake sales. A sophisticated research project was launched to find out what customers looked for in a shake. Should it be cheaper or chunkier or more chocolatey? The recipe was then tweaked accordingly. Yet still sales and profits stayed flat.
Starting point is 00:23:52 Puzzled, the fast food firm brought in one of Christensen's fellow researchers who stood in an outlet and asked himself a strange question. It wasn't what flavour to people like, nor how much do they want to spend. Instead, he asked, what are customers hiring their milkshakes to do? The researcher noticed that half of all milkshakes were purchased in the mornings by lone commuters who bought no other products. Quizzing these customers, he found that they'd stopped in before their long drives to work. They were hiring the shakes to fill their stomachs for the next few hours,
Starting point is 00:24:39 give them something to do as they drove, and all in a convenient package that would fit in their car's cup holder. Bagels, bananas or donuts weren't nearly as easy to consume at the wheel. And besides, they were guzzled down too quickly. The company had wasted time and money on altering the taste or cost of its shakes, when what it needed to do was make the drinks more attractive to commuting motorists. They should have formulated and marketed a breakfast drink, a morning milkshake. As Don Norman, the author of The Design of Everyday Things, says, A brilliant solution to the wrong problem can be worse than no solution at all.
Starting point is 00:25:32 D-D tanks might have looked a bit rickety, but they were brilliant too. A tank able to ride the waves, then rise up onto an enemy-held beach to begin blasting away, clearly impressed everyone who saw it. It solved the problem of how to make a tank float in calm seas, but was it solving the real problem at hand? How to invade Europe? Good designers never start by trying to solve the problem given to them, says Don Norman. They take the original problem as a suggestion, not as a final statement,
Starting point is 00:26:13 and they don't try to search for a solution until they've determined the real problem. The designers of the DD tanks were ingenious, and their crews were heroic. But in hindsight, it's all too easy to see that DD tanks were an unnecessary diversion. It's widely agreed that if only the 741sts tanks had been landed on Omaha Beach in the conventional way, many soldiers' lives would have been saved. But that's not the end of the story. D-Day was just the start of the invasion, and waiting inland was something more impenetrable
Starting point is 00:27:01 and more deadly than Hitler's beach defences. The soldiers leaving bloody Omaha were about to enter a hellscape, for which no ingenious Sherman tank had been designed. Cautionary tales will be back. Canadian women are looking for more. More out of themselves, their businesses, their elected leaders, and the world are out of them.
Starting point is 00:27:34 And that's why we're thrilled to introduce the Honest Talk podcast. I'm Jennifer Stewart. And I'm Catherine Clark. And in this podcast, we interview Canada's most inspiring women. Entrepreneurs, artists, athletes, politicians, and newsmakers, all at different stages of their journey. So if you're looking to connect, then we hope you'll join us. Listen to the Honest Talk podcast and IHeart Radio,
Starting point is 00:27:55 or wherever you listen to your podcasts. Run a business and not thinking about podcasting, think again. More Americans listen to podcasts than ads supported streaming music from Spotify and Pandora. And as the number one podcaster, IHearts twice as large as the next two combined. So whatever your customers listen to, they'll hear your message. Plus, only IHeart can extend your message to audiences across broadcast radio. Think podcasting can help your business. Think IHeart.
Starting point is 00:28:21 Streaming, radio, and podcasting. Call 844-844-I-Hare. Hart to get started. That's 844-844-I-Hart. Adolf Hitler, ever the lover of garish and gargantuan architectural projects, was convinced that the entire coastline of Europe could be made impregnable if only enough concrete was poured. The lands he'd conquered would become, he decreed, a festal, a fortress. Field Marshal Irwin Romel, the man Hitler sent to oversee the defences in France,
Starting point is 00:29:01 took her more realistic view. Hitler was living in Volker and Kukukshheim, Cloud Kuku-Land, if he thought the Atlantic Wall would prevent an Allied invasion. Touring the Normandy beaches before D-Day, Romel quickly realized that the much-publicized Atlantic Val was far less formidable when Nazi propagandists would have the world believe. There were great stretches of coast where no fortifications existed at all, and many of the completed bunkers were equipped with a mishmash of weaponry
Starting point is 00:29:39 and manned by substandard troops or foreigners from Russia or Eastern Europe fighting for the Nazis only under duress. Even had the fortresses of Hitler's ravings been really, many of his generals doubted the military logic of the whole Atlantic wall project. These bunkers would be pummeled from sea and air by the Allies, with the defenders trapped inside until the invading armies overran them and took them prisoner. It would be better to retreat inland slowly, making the Allies spill blood for every foot they advanced. The Germans would be helped in this by a formidable defensive network
Starting point is 00:30:27 stretching miles back from the coast, and for which they'd not spent a penny. It was built not by German engineers, nor enslaved labourers. Instead, it had evolved over centuries, thanks to Norman farmers and landowners. I'm speaking of the bocage. The boucage was a patchwork of small fields, divided by tall, thick hedgerows and deep sunken lanes. Such a landscape was easy to defend and a nightmare to attack. Coming to the first hedgerow, said one American soldier, we immediately saw death and destruction in its most violent form. A couple of German machine guns cleverly positioned could cut anyone wandering into the fields to ribbons.
Starting point is 00:31:29 Sherman tanks could have tipped the balance in the Allies' favour, but they simply couldn't move in the bocage. These hedgerows weren't made of concrete, but centuries of compacted dirt and a criss-crossing tangle of roots for the next best thing. Even a 33-ton tank couldn't smash through them. The best a Sherman could do was drive up and over the embankments, but in the process, they might fatally expose their vulnerable bellies to the enemy. One bitter two-day battle saw the Americans advance just half a mile through the Boccage,
Starting point is 00:32:12 with more than 400 tank crewmen killed or wounded in the war. the process. According to one GI, many American tankers fled the carnage. I saw dozens of them running like hell for the rear, he recalled. Such panic is understandable. These American soldiers had trained for months for the invasion, learning how best to cross the beaches and neutralized the Atlantic Wall. But no lessons had been offered on how to fight and win in the carge. And while much thought and effort had gone into the D.D. tanks and the other Hobart funnies, there was certainly no armored vehicles specially modified to deal with these ancient Norman hedges. Although there had been some talk before D-Day about hedgerows, said one
Starting point is 00:33:07 American general, nobody anticipated how difficult they would be. So just a few miles inland from Omaha Beach, the advance ground to a halt. It had taken mere hours to break through the vastly expensive Atlantic Wall, but for week after week the Americans struggled to beat the Boccage. America's mechanized army was at its best when performing great sweeping movements with speeding tanks and trucks and jeeps, but it had been slow, to a snail's pace, and then stopped altogether. We're stuck, complained one tank crewman. Things are going very awry.
Starting point is 00:33:58 The whole theory of mobility we've been taught of our racing across the battlefield has gone up in smoke. In the dark maze of lanes and hedges, the death toll rose to an alarming level, and many of those untouched by bullet or shell left the battlefield with mental exhaustion, so-called battle fatigue, or simply lay down their weapons and deserted. It wasn't clear that anyone in command had the slightest idea what to do to break the stalemate.
Starting point is 00:34:38 Why don't we get some sore teeth and put them on the front of the tank and cut through these hedges? The assembled tank crews laughed at the suggestion. The men had been brought together to break. rainstorm a solution to the bocage problem. But few saw much merit in this suggestion by their comrade from Tennessee. Wait a minute, said Staff Sergeant Curtis Cullen, defending the man. He's got an idea there. The 29-year-old Cullen mulled over the problem.
Starting point is 00:35:10 What kind of teeth could cut through a hedgerow that had stood solidly for centuries? Steel teeth, presumably. But where was there a ready supply of sharp and hardened steel? Wasn't there plenty on Omaha Beach? Suggested another member of the unit. The Germans, he pointed out, had littered the sands with so-called Czech hedgehogs and Belgian gates, both sharp steel obstacles intended to damage landing craft and vehicles alike.
Starting point is 00:35:46 So without seeking any higher authority, Someone was sent back to collect these steel beams, and the process began to weld them to the hull of a Sherman. Cullen and his comrades didn't know it, but they were engaged in something with today called workplace innovation. The concept encourages business owners to pay greater heed to the ideas of their workers, who, after all, see the problems their companies face, day after day and might come up with nifty solutions.
Starting point is 00:36:27 Workplace innovation theorists promise that greater productivity and profitability can be achieved, but only if employees are given permission to experiment and a certain amount of space to manage themselves. That permission is often not forthcoming, which is why, back in 1944, Sergeant Cullen kept his hedge-cutting experiments a secret. He feared the ridicule of the higher-ups. And maybe those officers would be right to laugh. Now armed with several sharp steel tusks,
Starting point is 00:37:06 Cullen's tank slowly drove into a hedgerow. And as always happened, it began to rise and climb over the barrier, exposing its belly. It was lucky no German was nearby with the bassoon. So Cullen put his thinking cap on again. What if, instead of driving slowly, the tank driver went full belt? Got something that will knock your eyes out. Putting down the phone, the top US general in Normandy, Omar Bradley,
Starting point is 00:37:43 hurried to Cullen's camp to see what all the fuss was about. He was greeted by a Sherman that looked for all the world like some metal rhinoceros. The tank backed off and ran head on towards a hedgerow, said Bradley. Its tusks bored into the wall and the tank broke through under a canopy of dirt. It had been a problem that had baffled Bradley's army for weeks. But here was the solution, and it was, in the general's words, absurdly simple. There wasn't a second to lose. steel was gathered up from the beach
Starting point is 00:38:25 and a team flown back to England to round up every available welder and their machines. Within days, 500 rhino tanks were ready for action. And soon after, 60% of all US tanks sported tusks with which to break through the brocage
Starting point is 00:38:45 and spray the German defenders with bullet and shell. The stalemate was that last, broken. We could see that the Americans had learned how to break through, said one German soldier, now put to flight and retreating under heavy fire and constant air attacks. There would be much bloodshed to come,
Starting point is 00:39:11 but the Americans were now trading lives for miles rather than meters gained. And some of that was down to the rhino tanks, the brainchild of an ordinary soldier. The Rhino wasn't a product of an arms company or a defence laboratory. It didn't have the long development time, the huge budget, and the triple A priority of the DD tanks. It was knocked up in the field from scrap metal
Starting point is 00:39:40 by men who had an intimate knowledge of the problem they were facing. The Rhino was well and truly MacGyvered. There was a little sergeant, said the Supreme Allied commander, Dwight Eisenhower. His name was Cullen, and he had an idea. It seemed like a crazy idea. But this thing worked, and it worked beautifully. The key sources for this episode were Normandy 44 by James Holland, overlord by Max Hastings,
Starting point is 00:40:21 Beyond the Beachhead by Joseph Balcosky, as well as Ryan Dillies interviews with D-Day veterans, Bill Merkert and Ben Franklin. For a full list of sources, go to timharford.com. Cautionary Tales is written by me, Tim Harford, with Andrew Wright, Alice Fines, and Ryan Dilley. It's produced by Georgia Mills and Marilyn Rust. The sound design and original music are the work of Pascal Wise,
Starting point is 00:40:54 Additional sound design is by Carlos San Juan at Brain Audio. Ben Nadaf Haferi edited the scripts. The show also wouldn't have been possible without the work of Jacob Weisberg, Greta Cohn, Sarah Nix, Eric Sandler, Christina Sullivan, Kira Posey and Owen Miller. Cautionary Tales is a production of Pushkin Industries. Do you want to support the stories we tell on Cautionary Tales? If so, you can join my new Cautionary Cautionary Cautionary Tales.
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