Why This ‘American’ Tank Destroyer Became Far Deadlier After The British Changed Just One Thing –  Hw

1943, an American M10 tank destroyer sits in a British workshop. It weighs 29.6 tons. It carries a crew of five. It’s 3-in gun fires an armor-piercing round at 792 m per second and penetrates 93 mm of steel at 500 yd. Germany’s Tiger 1 carries 100 mm of frontal armor. At any normal combat range, the M10’s gun cannot penetrate it.

British tankers and anti-tank gunners know this. They have watched shells bounce off Tigers in Tunisia. They have seen what happens next. But British engineers see something in this American machine. Not the gun, everything around it. The turret is open-topped and spacious. The diesel engine is dependable. And the gun mounting was designed by the Americans to be swapped.

So the British remove the 3-in gun and install their own weapon, the Ordnance 17-pounder. One change, penetration rises from 93 to 140 mm. The Tiger’s frontal armor, which shrugged off everything the Americans could throw at it, is now vulnerable at over 1,700 m. The Americans built the chassis, the British made it kill.

The anti-tank crisis that created the Achilles began on December the 1st, 1942 at the Battle of Tebourba in Tunisia. Tiger tanks of the 501st Heavy Tank Battalion attacked Allied positions. The result was catastrophic. 55 tanks lost, hundreds of vehicles destroyed, over 1,000 troops captured.

According to the battalion’s own after-action report, Allied columns fled the moment the Tigers appeared. The phenomenon spread so fast it earned its own name, Tigerphobia. Allied units began misidentifying Panzer IVs as Tigers. Field Marshal Montgomery reportedly banned reports referencing the Tiger’s superiority to prevent further panic.

But the problem was not psychological, it was mechanical. Every standard Allied tank and anti-tank gun failed against the Tiger’s frontal plate. Britain’s primary anti-tank weapon, the 6-pounder, could penetrate Tiger side armor at short range. It could not touch the front. The American 75-mm Sherman gun was even less effective.

When the Panther appeared in Normandy, comprising roughly 38% of German tank strength, the crisis deepened. The Panther’s 80-mm glacis plate, sloped at 55°, presented an effective thickness of approximately 140-mm. No standard Allied tank gun could defeat it. British planners, however, had anticipated this problem years earlier. In November 1940, before the 6-pounder had even reached front-line units, discussions began about its replacement.

On May 15th, 1941, the Ordnance Committee formally began work on a new anti-tank gun designed to penetrate 120 to 150-mm of armor at over 700 m. The caliber chosen was 76.2-mm. The projectile weighed 17 lb, and that weight gave the weapon its name. The first 100 guns were rushed to North Africa in late 1942, mounted on improvised 25-pounder carriages, because the proper carriage was not yet ready.

This stopgap was code-named Pheasant. It entered action in Tunisia in February 1943. According to Ordnance Board trial records, the 17-pounder could penetrate the Tiger I’s frontal armor at ranges exceeding 1,900 yd. No other Allied anti-tank weapon could reliably do the same. The gun existed.

The question was how to make it mobile. The M10 arrived in Britain through Lend-Lease and immediately caught the attention of the Department of Tank Design at the Ministry of Supply. The department had been searching for a low-silhouette, turreted, self-propelled anti-tank gun since mid-1942. When M10 hulls became available, they canceled their purpose-built design.

The American chassis solved the mobility problem. The conversion was straightforward compared to the Sherman Firefly, which required rotating the gun 90° and completely redesigning the turret interior. The M10’s larger, open-topped turret accepted the 17-pounder with far less modification. British engineers installed the 17-pounder Mark V, a variant built specifically for this conversion.

Work began at REME workshops at the Fighting Vehicle Proving Establishment, where roughly 160 units were completed. Production then shifted to the Royal Ordnance Factory at Leeds for higher volume output. Key modifications included a distinctive two-chamber muzzle brake with spherical openings to manage higher recoil forces. A larger counterweight was bolted to the turret rear to balance the longer barrel.

17 mm of additional armor plate were welded to the turret front and sides. Ammunition storage was reconfigured for the bigger rounds, reducing capacity from 54 to approximately 50. The timeline was critically late. Planners had wanted 1,000 Achilles ready for D-Day. Conversions did not begin until April 1944. By June 6th, only 124 were complete.

Many anti-tank units crossed the channel with standard 3-in M10s. Production accelerated rapidly after that. 816 were finished by December, and the final total reached approximately 1,100 before work stopped in April 1945. Two variants existed. The Achilles 1C used an earlier wedge-style counterweight. The Achilles 2C used the later duckbill counterweight.

According to Steven Zaloga’s research, the distinction was counterweight type, not engine. Only diesel-powered M10s were shipped Britain under Lend-Lease. Now, before we get into the combat record, if you are enjoying this deep dive into British engineering, hit subscribe. It takes a second, costs nothing, and helps the channel grow. Right.

Let us see what happened when this weapon met the enemy. The Achilles first saw combat in Normandy. The 62nd Anti-Tank Regiment, Royal Artillery, sailed with its 245th and 248th batteries equipped with the vehicle. On June 6th, 1944, the 246th and 248th batteries landed at Juno Beach attached to the 7th Canadian Infantry Brigade.

The most devastating engagement came during Operation Charnwood at the village of Buron on July 8th, 1944. B Troop, 245th Battery, positioned in an orchard south of Buron facing the Abbaye d’Ardenne. A German counterattack by 20 to 30 Panzer IVs and Panthers of the 12th SS Panzer Regiment rolled across their front.

According to Captain Tony Foulds, who commanded during the action, 13 enemy tanks were destroyed before the rest withdrew. The battery paid a heavy price. Four self-propelled guns knocked out, four more damaged. By the end of the day, just one of eight guns remained undamaged. 10 days earlier, on June 18th, the Germans had their first close look at an Achilles.

A vehicle named Chelsea from C Troop was knocked out southeast of Escoville. Officers from Panzer Regiment 22 of the 21st Panzer Division examined it with great interest. Once the Germans identified the Achilles by its muzzle break and counterweight, they began prioritizing it as a target, just as they did with Sherman Fireflies.

British crews responded by painting over these features to disguise the 17-pounder as a standard 3-in gun. Operational research confirmed the effectiveness at scale. Data from Operational Research Unit Report 33 recorded that across 27 engagements, 56 self-propelled anti-tank guns engaged 39 Tiger and Panther tanks. 26 destroyed for the loss of only six.

Mean engagement range was 1,090 yd. Self-propelled anti-tank guns proved approximately three times as effective as towed guns. The vehicle served everywhere Britain fought. In Italy, the 93rd Anti-Tank Regiment used Achilles at the River Savio crossing in October 1944. In France, the Polish 1st Armoured Division used them in the Falaise Pocket.

In the Netherlands, the 75th Anti-Tank regiment fired at pillboxes on the German frontier. The Achilles crossed the Rhine in March 1945 and fought through to the final advance into Germany. The comparative advantage against Allied equivalents was clear. The American M18 Hellcat 76 mm gun penetrated only 93 mm at 500 yd, roughly a third less than the Achilles.

The M36 Jackson’s 90 mm gun came closest at 129 mm, but the M36 did not reach combat until October 1944, 4 months after the Achilles had fought through Normandy’s bloodiest battles. Against German opponents, the Stug III’s 75 mm gun delivered 96 mm of penetration, about 30% less. The Jagdpanzer IV in its long-barreled variant managed 124 mm, still below the 17-pounder.

Only the Nashorn’s 88 mm Pak 43 exceeded it at 182 mm, but the Nashorn had 10 to 30 mm of armor and no rotating turret. The Achilles could traverse 360°. In September 1944, a new round entered service that pushed the Achilles further. Armor-piercing discarding sabot, or APDS, developed by Elp Amata and SW Copock at the Armaments Research Department, it used a small tungsten carbide sub-projectile encased in a full-caliber aluminum sabot.

Muzzle velocity reached approximately 3,950 ft per second. Penetration jumped to 209 mm at 500 m. The Tiger I became easy at any range, but APDS had serious accuracy problems. The muzzle brake aperture was too small for clean sabot separation, causing unpredictable flight. At 1,000 yd, one assessment estimated only a 14% hit probability on a target the size of a Panther turret.

Crews reserved it for targets that demanded it and relied on standard ammunition for most engagements. Legend has it that APDS made the 17-pounder capable of killing anything on the battlefield. The reality was more nuanced. Even with APDS, the Panther’s upper glacis remained extremely difficult. The Tiger II’s frontal armor was effectively immune except at very close range.

One statistic from the 86th anti-tank regiment illustrates the Achilles’ greatest vulnerability more vividly than any penetration figure. A single vehicle in that regiment drove back out of action three separate times with the entire turret crew dead. Two crews killed by air bursts, one by a direct hit.

The driver survived each time because he sat protected inside the hull. The open top that gave the Achilles its excellent visibility also made it a death trap under artillery fire. The Achilles outlived the war by decades. Britain used them in Korea before replacing them with the Centurion. Belgium received Achilles under the Mutual Defense Assistance Program.

Most remarkably, 48 Achilles were delivered to Denmark in 1955 after rebuilding in Canada. They served in Danish local defense units until 1989. 44 years after VE Day, Israel acquired M10 hulls from European scrapyards and mounted 17-pounders taken from captured Egyptian Archer vehicles, creating a hybrid they designated Zalaf, meaning sniper.

The 17-pounder’s design philosophy, prioritizing muzzle velocity and armor penetration above all, shaped every British tank gun that followed, the 20-pounder, the revolutionary L7 105 mm adopted worldwide by the American M60, the German Leopard 1, and dozens of other vehicles. The 120 mm guns that arm British tanks today.

That lineage traces directly back to the gun British engineers fitted inside an American tank destroyer in 1944. The Americans built the M10, thousands of them. A solid vehicle with a solid gun. Then British engineers changed one thing. They replaced that gun with the most effective anti-tank weapon the Western Allies possessed.

Same weight, same engine, same thin armor, same open turret, but it could now kill a tiger from over a mile away. That is what one gun change did. That is what British engineering did. And the Achilles, sitting in museums from Bovington to Aalborg, still testifies to it eight decades later.

QQ4 Bob Dylan and Keith Richards have been close friends for nearly 40 years. The friendship began on a live television program in November of 1986 in the 11 seconds after Bob Dylan called Keith Richards music derivative on camera. Keith Richard’s response to that assessment, one sentence said without anger, without performance, with the specific directness of a man who has nothing to prove and knows it made Bob Dylan laugh.

Then made Bob Dylan go quiet. then made Bob Dylan say two words that people who know Bob Dylan say he almost never said to anyone. This is the story of those 11 seconds and the 40 years that followed them. The program was a live music interview special broadcast on an American network on the evening of November 3rd, 1986. The format was simple.

Two musicians, a host, an hour of conversation about music and the state of it. The producers had assembled the pairing of Bob Dylan and Keith Richards with the specific calculation of television producers who understand that two people with equally strong and potentially incompatible views about what music is and what it should do will produce better television than two people who agree about everything.

The calculation was correct, though not in the way the producers had anticipated. Bob Dylan was 45 years old in November of 1986. Bob Dylan had released Empire Burlesque the previous year and had been on the road for most of the intervening period as part of the True Confessions tour with Tom Petty and the Heartbreakers.

Bob Dylan was in November of 1986 in one of the most prolific and restless phases of a career that had consisted almost entirely of prolific and restless phases. A career that had moved through folk, rock, country, gospel, and back again, that had been declared finished at least six times by the music press, and at each time continued with the serene indifference of a river to the opinions of people standing on its banks.

Bob Dylan had been redefining what music could be. Since 1962, Bob Dylan had invented and reinvented himself so many times that reinvention had become his defining characteristic, not in the superficial sense of a performer changing costumes, but in the deeper sense of a musician who had never allowed his work to settle into a form that could be anticipated or categorized from the outside.

Bob Dylan understood influence and originality and the relationship between them better than almost anyone alive in 1986. Bob Dylan had spent 24 years thinking carefully and specifically about where music came from and where music was going and what it meant that those two things were always in constant conversation with each other.

Keith Richards was 42 years old in November of 1986. Keith Richards had been playing guitar professionally since 1962. Keith Richards had built a career on a foundation of American blues and rhythm and blues. A foundation that Keith Richards had studied with the systematic devotion of someone who understood that the tradition he was building on was not incidental to the music he was making, but essential to it.

that you could not understand what Keith Richards did without understanding where Keith Richards had come from and what Keith Richards had been listening to since he was a teenager in Dartford with American Import Records and a secondhand guitar and no teacher except the recordings themselves. Keith Richards had never pretended otherwise. Keith Richards had in fact spent considerable energy across his career making the lineage explicit, naming the artists, citing the recordings, insisting on the acknowledgement of influence that the mainstream music

industry had a long history of suppressing or ignoring or crediting to the wrong people. If anything, Keith Richards was more transparent about his sources than most musicians of his generation. Keith Richards had always said openly that the Rolling Stones came directly from the blues, that Muddy Waters and Robert Johnson and the specific tradition of the Mississippi Delta were not background influences, but foundational ones.

The music Keith Richards made was in direct and sustained conversation with that tradition, something Keith Richards considered not a limitation, but a responsibility and a form of respect. The interview had been running for 8 minutes when the host asked Bob Dylan about the current state of rock and roll.

Bob Dylan answered with the density and the indirection that characterized Bob Dylan’s responses to direct questions, turning the question over, approaching it from an unexpected angle, finding his way to what he actually thought through a series of observations that moved like a river rather than a road. Bob Dylan was not a straightforward interview subject.

Bob Dylan had been asked about rock and roll in hundreds of interviews across 24 years and had developed the habit of treating the question as an invitation to think out loud rather than a request for a prepared position. The producer Gerald Sherman said afterward that in the first 8 minutes of the interview, he had been slightly anxious, not because anything was going wrong, but because nothing was going anywhere in particular yet.

The interview had the feeling of two conversations happening simultaneously. Bob Dylan’s internal one and the external one visible to the cameras. And Gerald Sherman was not certain in those first eight minutes that the two conversations would converge into something. Bob Dylan talked about influence. Bob Dylan talked about originality.

Bob Dylan talked about the difference between music that absorbed a tradition and transformed it and music that absorbed a tradition and reproduced it. And then Bob Dylan made his assessment. And then Bob Dylan said with the precision of a man making a musical assessment rather than a personal judgment that the Rolling Stones work, and Bob Dylan was specific, naming Keith Richards as the guitarist whose approach he was discussing was derivative in a way that Bob Dylan found limiting.

Bob Dylan said it without hostility. Bob Dylan said it as a technical observation about the relationship between source material and the work that came from it. Bob Dylan said that Keith Richards played the blues the way the blues had already been played, rather than using the blues as a starting point for something that had not yet been played.

Keith Richards had been listening to this with the specific attention Keith Richards gave to things being said about music by people who knew music. Keith Richards did not interrupt. Keith Richards did not shift in his chair or display any of the visible signals of a person preparing a defensive response. Keith Richards listened to Bob Dylan’s complete observation all the way to its conclusion without interrupting and without displaying any visible signal of preparing a response.

Then Keith Richards said one sentence. The sentence was not a rebuttal. The sentence did not defend Keith Richards music or argue for its originality or challenge Bob Dylan’s characterization of what the blues meant in the context of rock and roll. The sentence was something else entirely, something that required a specific kind of confidence to say.

The confidence of a person who has spent long enough thinking about the same things as the person they are talking to that they can locate the exact point where their thinking diverges and say something useful about that point rather than simply defending their own position. The sentence acknowledged everything Bob Dylan had said, the assessment, the distinction Bob Dylan was drawing, the specific musical concern underlying the observation, and then turned it 90°.

Keith Richards took Bob Dylan’s own framework, the one Bob Dylan had used to analyze Keith Richards relationship to the blues tradition, and applied it back to Bob Dylan’s work with the same precision Bob Dylan had used to apply it to Keith Richards. Spare aimed. The sentence asked Bob Dylan something about Bob Dylan’s own music, about the relationship between Bob Dylan’s sources and Bob Dylan’s output that Bob Dylan had not been asked on television before.

The sentence did not attack. The sentence illuminated. Bob Dylan laughed. The laugh was not the polite laugh of someone responding to a joke. The laugh was the involuntary laugh of someone who has been genuinely surprised. The specific kind of surprise that a person of exceptional intelligence experiences when someone else’s intelligence exceeds their expectations.

Bob Dylan laughed for 4 seconds. Then Bob Dylan stopped laughing. Then Bob Dylan was quiet for 3 seconds in the way that Bob Dylan was quiet when Bob Dylan was thinking rather than performing thought. Then Bob Dylan said, “You’re right.” The producer in the booth, a man named Gerald Sherman, who had been working in television for 14 years, said afterward that in 14 years of live television production, he had never heard Bob Dylan say those two words in a public forum.

Gerald Sherman said he had worked with Bob Dylan on two previous occasions and had observed Bob Dylan in numerous other contexts and that you’re right was not a phrase that Bob Dylan deployed easily or often because Bob Dylan had spent 24 years being right about music in ways that other people eventually caught up with. And the experience of being right ahead of everyone else does not generally produce a man who says you’re right readily when someone else makes a point.

The host of the program, a journalist named Patricia Wells, who had been interviewing musicians for 12 years, said afterward that the 11 seconds between Bob Dylan’s assessment and Bob Dylan saying, “You’re right,” were the most extraordinary 11 seconds of television she had been present for. Patricia Wells said that what she witnessed in those 11 seconds was not a debate or a confrontation or a celebrity exchange of competing opinions.

Patricia Wells said what she witnessed was one musician recognizing another musician as an equal, which was in the specific context of Bob Dylan in 1986, not something that happened in public very often. The interview continued for another 42 minutes after those 11 seconds. The conversation between Bob Dylan and Keith Richards in the remaining 42 minutes was described by everyone who watched it as fundamentally different from the first 8 minutes.

The host, Patricia Wells, who had been conducting music interviews for 12 years and understood the difference between the performance of conversation and actual conversation, said that at approximately the 9-minute mark, something shifted in the studio. That the formal interview, architecture dissolved, and what replaced it was something less structured and more genuine.

Bob Dylan and Keith Richards talked about influence and originality and the blues and what it meant to build on a tradition without being consumed by it. They talked about specific recordings and specific musicians with the specificity of two people who had spent their entire adult lives thinking about these things and rarely found another person who had thought about them with equivalent care.

They talked about where music came from and where music was going and whether those two questions were actually one question or two. Patricia Wells said afterward that she had asked approximately four questions in the remaining 42 minutes because Bob Dylan and Keith Richards did not require questions. They required only a room and a camera and the shared understanding that what they were saying together was worth recording carefully.

She said it was the best interview she had ever conducted and that she had conducted the smallest part of it. After the program, Bob Dylan and Keith Richards were in the corridor outside the studio when the host Patricia Wells passed them. Patricia Wells said she did not stop because she did not want to interrupt.

She observed them for approximately 30 seconds from a distance. She said they were talking with the ease of people who had known each other for years rather than people who had met for the first time 2 hours earlier. She said that something had shifted between them during the broadcast that the broadcast had made permanent rather than temporary.

She continued down the corridor and did not look back. She said in her account of that evening that she had decided in that moment not to interrupt the conversation because some conversations are more valuable than any question a journalist might ask and that the conversation she had observed for 30 seconds in the corridor outside the studio was one of them.

She had been a music journalist for 12 years. She recognized the difference. Bob Dylan and Keith Richards have maintained their friendship across four decades. They have appeared together at various events, most significantly at the concert for the Rock and Roll Hall of Fame in 1995, where people who were present described them as inseparable for most of the evening, occupying the same corner of the backstage area and talking with the concentrated attention of people who only have a limited amount of time together and intend to use it

well. Bob Dylan has spoken about Keith Richards in interviews with the specific thoughtful care that Bob Dylan reserves for musicians whose work Bob Dylan considers genuinely important rather than merely culturally prominent. Keith Richards has spoken about Bob Dylan in similar terms with the specific respect of someone who recognizes in another person a commitment to music that goes deeper than career.

Neither Bob Dylan nor Keith Richards has made a public statement specifically about how the friendship began or about the November 1986 interview. Bob Dylan has not mentioned the 11 seconds. Keith Richards has not mentioned the sentence. The interview exists in the archive. The 11 seconds are there. The laugh is there. The two words are there.

What is also there for anyone who watches the interview from its beginning and pays attention to the shift that happens at the 9-minute mark is the specific moment when two people who thought they were appearing on a television program discovered they were actually talking to each other. What Keith Richards said in that one sentence has never been officially reported.

The people who were in the studio that evening, Gerald Sherman, Patricia Wells, the floor crew, the two camera operators, the makeup artist who was watching from the side of the set, have described the sentence in consistent terms. They have described its effect. They have described Bob Dylan’s laugh and Bob Dylan’s silence and Bob Dylan’s two words.

They have not repeated the sentence itself in the specific understanding that the sentence was said between two musicians on a television program and that its power resided in the specific context of that exchange and would not survive removal from it intact. What can be said is this. Keith Richards said something to Bob Dylan about Bob Dylan’s music that used Bob Dylan’s own observation about Keith Richards as its starting point and arrived somewhere that Bob Dylan had not anticipated.

Keith Richards turned Bob Dylan’s assessment 90° and showed Bob Dylan something about the music they had both spent their lives making that Bob Dylan recognized immediately as true. And Bob Dylan said, “You’re right.” Two words said by Bob Dylan in public on live television in 1986 to Keith Richards in response to a single sentence Keith Richards had said about music.

Two words that Gerald Sherman, who had worked with Bob Dylan on two previous occasions, said he had never heard Bob Dylan say in a public forum. Two words that Patricia Wells, who had been interviewing musicians for 12 years, said were the most significant two words she had heard in those 12 years. Not because of their content, but because of who said them and what it cost to say them and what it meant that Keith Richards had produced them in 11 seconds from a conversation that began with Bob Dylan calling Keith Richards’s music derivative. And Keith Richards and

Bob Dylan have been close friends for nearly 40 years. The sentence did its work in 11 seconds on the evening of November 3rd, 1986. The work has been ongoing ever since. If this story moved you, subscribe and leave a comment below. Have you ever said something to someone that turned a potential disagreement into an unexpected and lasting connection? Tell us about it in the comments below.

Share this with someone who needs to be reminded that the right sentence said at the right moment can completely change the entire direction of a relationship. Ring the notification bell for more untold stories about the extraordinary human beings behind music’s greatest legends.