The Rhino Tank Innovation

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Chase for Business helps business owners like you with personalized guidance and convenient digital tools all in one place. With that guidance and your determination, you can take your business farther and help build a brighter future for your community. Learn more at Chase.com slash business. Chase for business. Make more of what's yours. The Chase Mobile app is available for select mobile devices. M essage and data rates may apply. JP Morgan Chase Bank NA, member FDIC Copyright 2026 JP Morgan Chase Company 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. Codenamed 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 . 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 surf . The battleships offshore are hammering these fortifications with their big guns . But while the Germans are many things, they're not stupid . Their pillboxes are angled to make them impervious to these shells, whilst still giving the defenders inside a perfect sightline 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 , 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 7 41st 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 . 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 screen allowing them to float. It's taken a huge effort to make these Sherman tanks seawort hy. 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 seawort Even by the standards of the English Channel, 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. We've never practiced in this kind of weather . But more than three miles from shore, a yellow signal flag still goes up . The landing craft drops its ramp and builds Sherman tank platters forward into the waves . I'm Tim Harford and you're listening to another cautionary tale . The tank was a defin ing 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 and thrown the British back into the sea. The blitzky 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 to fund the building of so-called land ships. These weren't ships at all, rather, they were primitive tan ks. And thanks to forward thinkers such as Churchill, the British had enjoyed an early lead in the development of armored 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 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 days of World War II. These fruits have been reaped by the enemy with terrible consequences . Churchill adored adventures and adventurers. He loved bold schemes 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 ragtag army of old men and teenage boys 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. 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 honor. 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 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, but he survived them all, and eventually found himself in charge of a unit that was pretty experimental, even by his standards. 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 . 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, then 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 swim 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, DD 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, DD tanks seem precarious, even a little mad. The Sherman's look ed a bit like they were hiding at the bottom of a big 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, 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, 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 DD tanks, swam towards a deserted English beach. We knew we weren't gonna make it, said one of the tank commanders. Winds in the English Channel that day were reaching force four, and the waves were a meter 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 Smas h, and six men drowned . A seventh tank got stuck on a sandbar and was abandoned by its crew. It then re-floated 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 . Cautionary tales will return shortly . Being a small business owner isn't just a career, it's a calling. Chase for business knows how much heart and effort go into building something of your own. That's why they make your business growth their priority. The team at Chase takes the time to understand your mission, where you are now and where you want to go. Their broad range of solutions is designed with you in mind so you can bring your ideas to life. 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Order online and pick up groceries at your local Ralph's Ralph's serving SoCal for over 150 years on 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 sink ings in April, the U.S. Navy thought it had been agreed that the DD tanks would only be launched weather permitting, and that the tank crews would heed the advice of its sailors before venturing 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 ro lling waves and decided they'd take the risk. Everyone from Churchill down clearly thought the DD tank was a splendid idea. 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 DD tanks. So their landing craft were taking the armor right up to the shore. But Private Bill Merkert and his comrades in the 7 41st 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. In calm weather, this would have been no cinch, but against the seas that day, even an experienced sailor would have stru ggled . The DD 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 a struck, but I was in no doubt we were in serious trouble . He was soon proved correct . 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 raft to await rescue and reflected on the squandering of nearly half of the entire DD force . That lost firepower could have made a big difference to the soldiers fighting on Omaha, he concluded. 19-year-old Sergeant Ben Frankl in was one of those soldiers wading through the surf and sorely missing the support of a Sherman tank. 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, German private Franz Gockel 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 killed . The lack of armor 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 swathe through Hitler's de fenses . That didn't happen. The attacking troops on Omaha Beach slowly but surely knocked out one German strong point after another. The Atlantic Wall had cost Nazi Germany a fortune to constru ct, but had held up the Allies for a few hours at most . So the sinking of the 7 41st's DD 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. One wonders why the concept of amphibious tanks was ever seriously entertained in the first place. 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 . He's right . An official Army report said the DD 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 . Zack Morris, author of W hen the Beaches Trembled, notes that in the war against Japan and the Pacific, where incidentally DD tanks had been rejected, the US Navy had instead equipped small landing cra 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. 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 . Christiansen 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 . Puzzled, the fast food firm brought in one of Christiansen's fellow researchers , who stood in an outlet and asked himself a strange question. It wasn't, what flavor do 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 chefs 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. DD 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 trialed . 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, 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 divers ion . It's widely agreed that if only the 7 41st 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 in land was something more impenetrable and more deadly than Hitler's beach defenses. 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. 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Additional restrictions may apply. Please speak with a business banker for more inform ation. JP Morgan Chase Bank, NA, member FDIC. Run a business and not thinking about podcasting? Think again. 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 are into: true crime, sports, comedy, culture, they'll hear your message. Plus, only iHeart can extend your message to audiences across broadcast radio. And all this reach means everything. Just think about the universal marketing formula. The number of consumers who hear your message times the response rate equals the res ults. Now let's get those results growing for you. Think podcasting can help your business? Think iHeart, streaming, radio, and podcasting. Let us show you at iHeartAdvertising.com. That's iHeartAdvertis ing.com. Or call 844-844-IHeart. One more time. Call 844-844-IHeart and get podcasting working for you. This message is brought to you by Ralphs. If you're into entertainment podcasts, you know it's all about the details that pull you in and keep you engaged. The right details make everything feel seamless. And with Ralph's, you can plan ahead by keeping your kitchen stocked with fresh groceries and essentials. So the details of your day feel seamless right from the start. Order online and pick up groceries at your local Ralph's Ralph's serving SoCal for over 150 years . 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 had conquered would become, he decreed, a festung, a fortress . Field Marshal Irvin Rommel, the man Hitler sent to oversee the defences in France, took a more realistic view. Hitler was living in Volkern Kuckucksheim, Cloud Kuckouland, if he thought the Atlantic Wall would prevent an Allied invasion . Touring the Normandy beaches before D-Day, Romold quickly realized that the much publicized Atlantic Wall was far less formidable than 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 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 real , 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 stretching miles back from the coast, and for which they'd not spent a It was built not by German engineers nor enslaved laborers. Instead, it had evolved over centuries, thanks to Norman farmers and landowners. I'm speaking of the bocage . The bocage 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 . Sherman tanks could have tipped the balance in the Allies' favor , 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, 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 bocage, with more than 400 tank crewmen killed or wounded in 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 neutralize the Atlantic W all. But no lessons had been offered on how to fight and win in the Bocage . And while much thought and effort had gone into the DD tanks and the other Hobart funnies, there were certainly no armoured vehicles specially modified to deal with these ancient Norman hedges . Although there had been some talk before D-Day about hedgerows, said one American general. Nobody anticipated how difficult they would be . So just a few miles inland from Omaha Beach, the advance ground to a h alt . It had taken mere hours to break through the vastly expensive Atlantic Wall, but for week after week, the Americans struggled to beat the bocage . America's mechanized army was at its best when performing great sweeping movements with speeding tanks and trucks and jeeps, but it had been slowed to a snail's pace, and then stopped altogether . We're stuck, complained one tank crewman. Things are going very awry. 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 stalem ate. 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 brainstorm a solution to the bokage 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 . 29-year-old Cullen mouled over the problem . What kind of teeth could cut through a hedgerow that had stood solidly for centuries