Only Erich Raeder, the German navy commander, saw the danger clearly enough to press repeatedly and with great conviction for another way to gain Germany’s goals

July 5th, 2023

How Hitler Could Have Won World War II by Bevin Alexander When Hitler announced his “resolve to bring about the destruction of the vitality of Russia in the spring of 1941,” Bevin Alexander explains (in How Hitler Could Have Won World War II), his top army generals, along with their staffs, amassed arguments to convince him to neutralize Britain before turning on Russia:

Only Erich Raeder, the German navy commander, saw the danger clearly enough to press repeatedly and with great conviction for another way to gain Germany’s goals.

[…]

Major General Alfred Jodl, chief of operations for the Oberkommando der Wehrmacht (OKW), or armed forces supreme command, felt the same way, though less openly and less forcefully. In a June 30, 1940, memorandum Jodl wrote that if the strike across the Channel did not come off, the Mediterranean offered the best arena to defeat Britain. His recommendation was to seize Egypt and the Suez Canal. Maybe the Italians could do it alone. If not, the Germans could help.

At the time the British had only 36,000 men in Egypt, including a single incomplete armored division under the command of General Sir Archibald Wavell. Moreover, Italy’s entry into the war had closed off Britain’s supply line through the Mediterranean except by means of heavily guarded convoys. The main British route now had to go 12,000 miles around the Cape of Good Hope in South Africa, and up through the Red Sea.

Even if Britain devoted all its strength to building a strong army in Egypt, it would take months, perhaps a year, to do so. And Britain was not going to undertake such a task because it had to concentrate most of its efforts on defense of the homeland.

Italy, aided by Germany, could get superior forces to Italy’s colony of Libya far more quickly. At this stage, it would be relatively easy to use Luftwaffe bombers to neutralize Malta, a British possession only sixty miles south of Sicily, where aircraft, ships, and submarines constituted a major danger to Italian supply ships and reinforcements moving between Italy and Tripoli in Libya.

Hitler in his July 31 meeting did not wholly exclude a “peripheral strategy” in the Mediterranean, and Generals Walther von Brauchitsch, commander in chief of the army, and Franz Halder, chief of staff in the army high command, Oberkommando des Heeres (OKH), proposed sending panzer forces (an “expeditionary corps”) and aircraft to Libya to help the Italians, who were planning an offensive into Egypt.

[…]

But Raeder’s main argument was that the Axis should capture the Suez Canal. After Suez, German panzers could advance quickly through Palestine and Syria as far as Turkey.

“If we reach that point, Turkey will be in our power,” Raeder emphasized. “The Russian problem will then appear in a different light. It is doubtful whether an advance against Russia from the north [that is, Poland and Romania] will be necessary.”

No one realized this truth better than Winston Churchill. In a message to President Roosevelt a few months later, he asserted that if Egypt and the Middle East were lost, continuation of the war “would be a hard, long, and bleak proposition,” even if the United States entered.

[…]

Once Axis forces overran Egypt and the Suez Canal, they would close the eastern Mediterranean to the Royal Navy. The British fleet would immediately retreat into the Red Sea, because it could not be adequately supplied by convoys through the western Mediterranean. Whether or not the Germans seized Gibraltar, Britain would be strategically paralyzed.

[…]

In possession of the Middle East, all of North and West Africa, and Europe west of Russia, its armed forces virtually intact, its economy able to exploit the resources of three continents, Germany would be virtually invincible. Britain’s defiance on the periphery of Europe would become increasingly irrelevant. Germany would not have to inaugurate an all-out U-boat war against its shipping.

Where Barbies rule and Kens are an underclass

July 4th, 2023

Greta Gerwig, the brain behind the new Barbie movie, considers herself a feminist, but…

But this movie is also dealing with [the idea that] any kind of hierarchical power structure that moves in any direction isn’t so great. You go to Mattel and it is really like, “Oh, Barbie has been president since 1991. Barbie had gone to the moon before women could get credit cards.” We kind of extrapolated out from that that Barbieland is this reversed world [where Barbies rule and Kens are an underclass]. The reverse structure of whatever Barbieland is, is almost like Planet of the Apes. You can see how unfair this is for the Kens because it’s totally unsustainable.

Secession Day comes once a year!

July 4th, 2023

Once again, happy Secession Day:

An M-80 contains 80 grains of flash powder

July 3rd, 2023

When I was a kid, every red-blooded American boy wanted to get his hands on some M-80s this time of year:

M-80s were originally made in the mid 20th century for the U.S. military to simulate explosives or artillery fire; later, M-80s were manufactured as fireworks. Traditionally, M-80s were made from a small cardboard tube, often red, approximately 1 1/2 inches (3.8 cm) long and 9/16 inch (1.4 cm) inside diameter, with a fuse coming out of the side; this type of fuse is commonly known as cannon fuse or Visco fuse, after a company responsible for standardizing the product. The tubes usually hold approximately 3 grams of pyrotechnic flash powder. The “M” is designated by a U.S. military convention for “standard” equipment and “80″ is for the 80 grains (5 grams) of flash powder within it.

They’re not quite legal:

Because an M-80 is a pyrotechnic device containing a charge in excess of 50 milligrams of pyrotechnic flash powder, civilian use requires a license issued by federal authorities. This is the result of the Child Protection Act of 1966 and regulation by the Consumer Product Safety Commission, with the purpose of limiting the potential property damage and bodily harm M-80s can cause. This law also covers cherry bombs.

In 1975, federal regulations were passed to limit all consumer-grade fireworks available for general sale to the public in the United States to a maximum of 50 milligrams flash powder, down from a previous maximum of 200 milligrams. However, firecrackers mounted onto a rocket stick, or other aerial firework devices, such as rockets, Roman candles, and the larger version of M-80s (M-1000 etc.), may still have significantly more, up to 130 mg, or more, depending on device and classification, and can be legally purchased by any American civilian citizen, except where prohibited by state law.

A person with a federal explosives license, issued by the ATF, may be allowed to purchase M-80s. Federal and state officials sometimes distribute them to farmers to scare away wildlife damaging their crops.

M-84-Flash-Bang-GrenadeAn M84 flash-bang grenade contains 4.5 grams of magnesium and ammonium nitrate, by comparison:

Upon detonation, it emits an intensely loud “bang” of 170–180 decibels and a blinding flash of more than one million candela within 5 feet (1.5 meters) of initiation, sufficient to cause immediate flash blindness, deafness, tinnitus, and inner ear disturbance.

David Hambling, author of Swarm Troopers, explains drone warfare in Ukraine

July 2nd, 2023

David Hambling, author of Swarm Troopers, explains drone warfare in Ukraine:

There are still only 24 hours in a day

June 30th, 2023

Real GDP per capita has doubled since the early 1980s, Alex Tabarrok noted, but there are still only 24 hours in a day:

How do consumers respond to all that increased wealth and no additional time? By focusing consumption on goods that are cheap to consume in time. We consume “fast food,” we choose to watch television or movies “on demand,” rather than read books or go to plays or live music performances. We consume multiple goods at the same time as when we eat and watch, talk and drive, and exercise and listen. And we manage, schedule and control our time more carefully with time planners, “to do” lists and calendaring. A search at Amazon for “time management,” for example, leads to over 10,000 hits.

Time management is a cognitively strenuous task, leaving us feeling harried. As the opportunity cost of time increases, our concern about “wasting” our precious hours grows more acute. On balance, we are better off, but the blessing of high-value time can overwhelm some individuals, just as can the ready availability of high-calorie food.

[…]

By the way, the same theory also explains why life often appears to unfold at a slower, more serene pace in developing nations. It’s not just an illusion of being on holiday. In places where time is less economically valuable, meals stretch more leisurely, conversations delve deeper, and time itself seems to trudge rather than race. In contrast, with economic development comes an increased pace of life–characterized by a proliferation of fast food, accelerated conversation, and even brisker walking (Levine & Norenzayan, 1999).

They were told to exaggerate as much as possible the main error that the instructor identified

June 29th, 2023

A persistent error is a sign that learning has occurred, but the student has inadvertently learned the “wrong” way really, really well and needs to unlearn it:

Researchers at the University of Verona (Milanese et al., 2008) conducted a study of thirty 13-yr olds learning how to perform the standing long jump in three sessions spread out over a three week period.

[…]

One group received instruction using an experimental teaching method called “Method of Amplification of Error” (MAE group). More details on this in a moment, but the tl;dr version is that this method involves doing things wrong on purpose, not just doing things correctly.

Another group received the traditional instructional method of verbal instruction (direct instruction group).

And the third group received no instructions at all, and just practiced on their own (control group).

[…]

The kids who received no instructions at all performed pretty much the same at both tests. They jumped 158.9cm on the first day of training and 160.6cm on the final day of training. A difference which isn’t statistically significant, and is pretty much what you’d expect.

On the other hand, the students who received instruction and feedback during training did improve over the course of three weeks. They started out at 159.4cm, and improved to 162.3cm by the final test – a gain of 2.9cm. And though an improvement of just over an inch may not sound like much, this would have been the difference between medaling and not medaling in the men’s long jump at the 2020 Tokyo Olympics.

And how did the amplification of error group do?

Well, the kids who were coached using the Method of Amplification of Error improved by an average of 20.4cm, going from 159.5cm on the first day of training to 179.9cm three weeks later. This is almost 7 times the improvement of the regular instruction group, and would have been the difference between Gold and Bronze at the same 2020 Olympics. In the same exact amount of training time!

[…]

On the surface, the Method of Amplification of Error training was not hugely different. The only difference was that instead of being instructed to jump with the correct technique, they were told to exaggerate as much as possible the main error that the instructor identified.

[…]

It seems pretty counterintuitive to practice doing something the exact wrong way, but the researchers explain that this actually deepens our understanding of what not to do and initiates an internal search for a better way to perform the skill.

Guderian was less interested in destroying the enemy than in forcing defenders to keep their heads down

June 28th, 2023

How Hitler Could Have Won World War II by Bevin AlexanderBefore the campaign to invade France started, Bevin Alexander explains, in How Hitler Could Have Won World War II, Guderian had worked out a plan of attack by the Luftwaffe:

Since few of his own artillery pieces could get to Sedan in the press of men, horses, and machines on the roads to the rear, Guderian intended to use Stukas as aerial artillery to help his infantry get across the river. He wanted a few aircraft to remain over Sedan before and during the crossing to make both actual and fake bombing and strafing runs on the French positions. Guderian was less interested in destroying the enemy than in forcing defenders to keep their heads down so his infantry could rush across the stream and find lodgment on the far side. This is what he had worked out with the Luftwaffe staff.

[…]

They used the tactics he had worked out beforehand: one group of Stukas bombed and machine-gunned trenches, pillboxes, and artillery positions (or pretended to do so), while a second group circled above, waiting to take over. Above these was a fighter shield.

[…]

The effects were remarkable. When the assault force, 1st Rifle Regiment, assembled on the river just west of Sedan, enemy artillery was alert and fired at the slightest movement. But the unending strikes and faked strikes by the aircraft virtually paralyzed the French. Artillerymen abandoned their guns, and machine-gunners kept their heads down and could not fire.

As a consequence 1st Rifle Regiment crossed the river in collapsible rubber boats with little loss and seized commanding heights on the south bank.

Purposefully doing things extremely wrong provides us with a lot more information

June 27th, 2023

In a recent study, Arizona State University professor Rob Gray trained casual baseball player to hit a baseball the right way or the wrong way:

One group — the “right way” group — practiced hitting the ball the correct way. Their instructions were to “hit a hard line drive into fair play.”

And during their training sessions, a coach would observe and give them feedback on their technique and mechanics. And provide suggestions on how to improve their performance.

The “wrong way” group on the other hand, received no technical instructions and no corrective feedback during their training sessions.

And their hitting instructions changed from one training session to the next.

One week they were asked to “hit the ball as far to the right as possible.” Another week they were asked to “hit the ball as far to the left as possible.” Then they were asked to “try to pop the ball up in the air.” And then to “try to drive the ball into the ground.”

They were also asked to “hit a hard line drive into fair play” in one of their practice sessions, just like the right way group. But in five of their six practice sessions, they were asked to practice hitting the ball all the wrong ways.

[…]

Well, as you would expect, the right way group that got coaching and practiced hitting into fair play improved their hitting in several key areas.

Their batting average improved, they struck out less often, and they hit more doubles/triples/home runs than they did in their initial test too.

But the wrong way group, which spent 5/6th of their time practicing hitting balls into foul territory, and other undesirable hits also improved their batting average, strikeout percentage, and slugging percentage.

And they not only improved in these areas, but improved by a lot more than the right way group did!

[…]

The value lies in learning how to achieve specific undesirable outcomes, on purpose, with some consistency. Because it seems that purposefully doing things extremely wrong provides us with a lot more information about how to do things correctly, than trying to do things correctly and accidentally getting it slightly wrong.

When I am weaker than you, I ask you for freedom because that is according to your principles

June 26th, 2023

Suicide of the West by James BurnhamI was recently listening to the audiobook version of James Burnham‘s Suicide of the West, when he quoted Louis Veuillot as saying, “When I am the weaker, I ask you for my freedom, because that is your principle. But when I am the stronger, I take away your freedom, because that is my principle.”

Naturally I immediately recognized the quote from Frank Herbert’s Children of Dune, in slightly different form: “When I am weaker than you, I ask you for freedom because that is according to your principles; when I am stronger than you, I take away your freedom because that is according to my principles.”

Centurions by Jean LarteguyIn fact, I also came across another version in Jean Lartéguy‘s The Centurions: “The liberty which you demand from us in the name of your principles, we deny you in the name of ours.”

It turns out Veuillot never said any of the three versions:

According to Pierre Pierrard, this was attributed to Veuillot by Montalambert, and Veuillot protested he did not say it.

A few things he did say:

Newspapers have become such a danger that it is necessary to create many. You cannot contend against the Press, except through its multitude. Add flood to flood, and let them drown one another, forming no more than a swamp, or, if you will, a sea. The swamp has its lagoons, the sea its moments of slumber. We will see whether it is possible to build some Venice within it.

When I voted, my equality tumbled into the box with my ballot; they disappeared together.

If I could re-establish a class of nobles, I should do so at once, and I would not belong to it.

Amongst the amusements of Paris must be counted duels between journalists.

The federal court decision affecting homeless tent encampments in America

June 25th, 2023

Five years ago, a federal court issued a crucial ruling, Martin v. Boise, affecting homeless tent encampments in America:

People experiencing homelessness, the Ninth Circuit Court of Appeals said, can’t be punished for sleeping outside on public property if there are no adequate alternatives available.

[…]

The case dates back to 2009, when Robert Martin and a group of fellow homeless residents in Boise, Idaho, sued, arguing that police citations they received for breaking local camping bans violated their constitutional rights. In 2018, the Ninth Circuit agreed that prosecuting people for sleeping or camping on public property when they have no home or shelter to go to violated the Eighth Amendment’s prohibition on cruel and unusual punishment.

“The government cannot criminalize indigent, homeless people for sleeping outdoors, on public property, on the false premise they had a choice in the matter,” the court declared.

States, cities, and counties urged the US Supreme Court to take up the case, arguing the Ninth Circuit had created “a de facto” right to live on sidewalks and in parks that would “cripple” local leaders’ ability to safely govern their communities. But in 2019, the court declined, baffling some experts, though others suspect it’s because there were no conflicting circuit decisions at the time.

[…]

While the decision only formally applies in areas under the Ninth Circuit’s jurisdiction, the ruling has reverberated nationally, as local governments consider how to address unsheltered homelessness in ways that could avoid costly constitutional legal battles. There have already been dozens of court cases citing Martin, including in the Fourth Circuit in Virginia, and federal lower courts in Ohio, Missouri, Florida, Texas, New York, and Hawaii.

For now, though, Martin’s impact can be seen most clearly out West. Just before Christmas 2022, for example, a district judge cited Martin when she ruled that San Francisco can no longer enforce encampment sweeps — meaning clear out homeless individuals and their property from an outdoor area — since the city lacks enough shelter beds for those experiencing homelessness to move into. San Francisco appealed the decision, arguing it’s “unnecessarily broad and has put the City in an impossible situation.”

In Phoenix, Arizona, residents and business owners filed a lawsuit last summer against the city for allowing a downtown homeless encampment to grow with nearly 1,000 people, but a federal judge — echoing Martin — barred Phoenix in December from conducting sweeps if there are more homeless people than shelter beds available. A competing decision issued in March by a state judge ordered Phoenix officials to clean up the “public nuisance” at the encampment by July 10, arguing the city has “erroneously” applied Martin to date.

The goal of productive failure is not to get the correct answer faster and more easily via shallower learning

June 24th, 2023

Early floundering can lead to better learning:

Generally, teaching looks something like:

  1. Explain how to do something (lecture)
  2. Show students what it looks like in action (demonstration)
  3. Fix their off-target attempts, to help them minimize “failure,” and reward them for their successes (feedback)

This sequence tends to emphasize getting to the correct answer as expeditiously as possible.

[…]

A pair of researchers (Kapur & Bielaczyc, 2011) conducted a study of “productive failure” to see if early floundering would lead to better learning than the traditional teaching approach (“direct instruction”).

[…]

The direct instruction class began learning about average speed with a lecture.

The teacher explained the concepts, worked through some examples, encouraged questions, and had students solve practice problems.

Then they reviewed the problems and discussed the solutions.

For homework, they were assigned similar problems in their workbook.

[…]

The productive failure class was split up into small groups, and each was tasked with solving two complex problems…

They were given these problems with no teacher support or guidance, but simply allowed two class periods to try to solve each problem (4 classes total).

There was also no homework, though they did receive extra problems to work on individually when the group problems were complete (2 class periods).

After 6 sessions of working on their own, the class spent their final class session sharing their solutions and strategies with the teacher and each other.

Only then did the teacher finally explain how to solve these problems the “correct” way, and help the students go through their previous work, fix their mistakes, and ensure they could arrive at the correct answer.

Ultimately, the productive failure group spent 7 class sessions working on calculating average speed, just like the direct instruction group. But they spent most of these classes floundering on their own, and doing many things wrong. It was only during the 7th and final class that they learned the correct way to approach these problems.

[…]

As you can probably imagine, the direct instruction group did waaaay better than the productive failure group in the early stages of learning.

The direct instruction group averaged a score of 91.4% on their homework.

Meanwhile, the productive failure group performed miserably on their unguided attempts to solve the complex problems. Only 2 out of the 12 groups (16%) arrived at the correct solutions. And when they had to work on the problems individually, their average score of 11.5% was even worse.

But a very different picture emerges when you look at the groups’ performance on the post-test.

On the final test, the performance between the two groups flipped, and the productive failure group outscored the direct instruction group by a significant margin.

On the simple problems, the productive failure group earned an average score of 84.8% (vs. 75.3% for the direct instruction group).

And on the complex problem, the productive failure group earned an average score of 59.7% (vs. 42.4% for the direct instruction group).

[…]

However, in much the way that spaced, random, and variable practice lead to worse performance in the short term, but better performance in the long term, it seems that the goal of productive failure is not to get the correct answer faster and more easily via shallower learning (“unproductive success”), but instead, to cultivate a deeper understanding of the fundamental principles and various ways of arriving at a solution even at the expense of short-term performance.

For more effective practice, try…longer…pauses

June 23rd, 2023

For more effective practice, try…longer…pauses:

Several researchers have looked at something known as the “inter-trial interval” or “post-KR delay” (KR stands for Knowledge of Results). This is the amount of time that elapses between one practice attempt and the next. For instance, if you’re practicing a tricky shift, you could just execute the shift over and over with no pauses between attempts. Or, you could try the shift, pause, and then try again. That pause between attempts is the inter-trial interval.

Thinking back, I’m not sure I ever made time for even the slightest pause between practice attempts when I was a kid. I totally piñata’d my way through every practice session. Heck, even in lessons I’d often cut my teachers off while they were still talking in a rush to play the passage again and get it right.

I always assumed that learning happened during the time my muscles were moving. The idea that some of the learning might take place in the time between practice attempts never occurred to me.

[…]

A 2005 study (Bock et al.) in the journal Experimental Brain Research yields a few clues.

35 participants were split up into six groups, and given one practice session (and 25 practice attempts) to learn a tricky motor task.

The only difference between groups was the amount of time each was given between practice attempts. One group received a 1 second pause between attempts, while the others were given either 5, 10, 15, 20, or 40 seconds.

[…]

Everyone improved with practice, but the participants who received only a 1-second pause between practice attempts consistently performed worse than the others, and weren’t as accurate in their efforts to hit the target.

[…]

A 2007 study (Huang & Shadmehrin) in the Journal of Neurophysiology also reported on this phenomenon.

[…]

Anyhow, the researchers in this study replicated the findings of the other study, observing that the longer delay of 14 seconds between practice attempts led to more rapid improvements than a shorter 4-second delay.

[…]

Take your time between repetitions. Pause. And don’t just count to five or 7 or 11, but use that time to ponder or reflect on what just happened, and why it happened. Plan your next move. Give it a go.

Hydrogen fuel cells have found their groove

June 22nd, 2023

Hydrogen fuel cells have found their groove, IEEE Spectrum reports:

Now scientists have found that adding grooves to PEM fuel cells can improve the performance of these devices by up to 50 percent compared with state-of-the-art conventional electrodes under standard operating conditions.

[…]

Conventional PEM fuel cell electrodes are composed of a carbon-supported platinum catalyst and ion-conducting polymers known as ionomers, which are mixed in an ink slurry and deposited on a membrane or other structure as a porous electrode. This creates a random electrode structure with a complex, mazelike network of narrow pores that limits the flow within the fuel cell. This structure has largely stayed the same for more than 30 years, the researchers note.

In contrast, the new electrodes feature catalyst ridges loaded with ionomers separated by empty grooves. The ridges improve proton transport, while the grooves simultaneously help oxygen flow.

In conventional PEM fuel cell electrodes, a high ionomer content may enhance proton transport, but it typically also limits oxygen flow. By separating proton and oxygen flow along grooves and ridges, the new electrodes help improve the transport of both. This also helps keep reaction rates uniform in the fuel cell, boosting catalyst performance.

The scientists fabricated the new electrodes by depositing a mixture of carbon-supported platinum catalyst and ionomer in a patterned silicon template, followed by a transfer to a membrane made of the common polymer electrolyte known as Nafion. They experimented with electrodes with grooves 1 to 2 micrometers wide, and had grooves repeat across the electrodes every 3 to 6 µm. The narrower the grooves and the shorter the distances between them, the better the performance.

[…]

The best-performing grooved electrodes were also significantly more durable than regular electrodes, displaying 170 percent higher current density after 500 cycles of activity. The researchers note that pores in conventional electrodes collapse over time due to corrosion, hampering their performance. By contrast, the grooved electrode structures remained relatively intact.

France had suffered great devastation in World War I and did not want to fight the next war on French soil

June 21st, 2023

How Hitler Could Have Won World War II by Bevin AlexanderGermany’s original plan for the attack in the West was astonishingly modest, Bevin Alexander argues, in How Hitler Could Have Won World War II:

It aimed at no decision. It didn’t even anticipate a victory over France.

The initial proposal, produced on Hitler’s orders by the Oberkommando des Heeres (OKH), or army command, in October 1939, hoped merely to defeat large portions of the Allied armies and gain territory in Holland, Belgium, and northern France “for successful air and sea operations against Britain and as a broad protective zone for the Ruhr” industrial region east of Holland.

[…]

Once the Germans tipped their hand, the Allies intended to throw forward strong forces to meet the Germans in Belgium, though it was the wrong thing to do. The sensible course would be to remain in already prepared defenses along the Belgian frontier, or withdraw to the Somme River fifty miles south, form a powerful defensive line, take advantage of the Allies’ two-to-one superiority in artillery, and launch a counterstroke against the exposed southern flank of the Germans as they drove westward.

[…]

But France had suffered great devastation in World War I and did not want to fight the next war on French soil.

[…]

They expected to use the Dyle, a north-flowing river some fifteen miles east of Brussels, as the main defensive barrier, sending their most mobile forces forty miles farther east to the Meuse (Maas) River to slow the German advance.

[…]

It required their main forces to abandon already built fortifications along the frontier, move rapidly to the Dyle, and dig a new defensive line in the two or three days they were likely to have before the Germans arrived.

[…]

They anticipated a stalemate, the same condition the Germans had to accept at the end of the autumn battles in 1914. The only improvement would be that the coast of northern France, Belgium, and Holland would be available to pursue a naval and air war against Britain.

[…]

With Rundstedt’s approval, Manstein proposed that the main weight of the German attack be shifted to Army Group A and the Ardennes, a heavily forested region of low mountains in eastern Belgium and northern Luxembourg. He advocated that the vast bulk of Germany’s ten panzer divisions be concentrated there to press through to Sedan on the Meuse River, cross it before a substantial French defense could be set up, then turn westward and drive through virtually undefended territory to the English Channel. This would cut off all the Allied armies in Belgium and force them to surrender.

Manstein urged that a major decoy offensive still should be launched into northern Belgium and Holland under Army Group B, commanded by Fedor von Bock. Bock’s armies should make as much noise as possible to convince the Allies that the main effort was coming just where they expected it. This would induce them to commit most of their mobile forces to Belgium. The farther they advanced, the more certain would be their destruction.

[…]

Walther von Brauchitsch, commander of the Germany army, and Franz Halder, chief of the army staff, did not like the idea of their plan being tossed out, and they did not share Manstein and Guderian’s enthusiasm for tanks.

[…]

Manstein and Guderian were certain the Meuse could be breached quickly with only panzer divisions and Luftwaffe bombers, and they believed speed would guarantee that the French would not have time to bring up enough troops to stop them. Speed also would ensure that few enemy units would be in place to block the panzers as they drove right across France to the Channel.

[…]

On February 17, Manstein was summoned to Berlin to report to Hitler for an interview and luncheon, along with other newly appointed corps commanders.

[…]

On February 17, Manstein was summoned to Berlin to report to Hitler for an interview and luncheon, along with other newly appointed corps commanders.

[…]

“I found him surprisingly quick to grasp the points which our army group had been advocating for many months past, and he entirely agreed with what I had to say,” Manstein wrote later.

[…]

Manstein’s idea became known in the German army as the Sichelschnitt, or “sickle-cut plan,” an apt description signifying that a strong armored thrust would cut through the weak portion of the Allied defenses like a harvester’s sickle cut through soft stalks of grass or grain.

[…]

It was a radical and astonishing transformation and the best military decision Adolf Hitler ever made. By shifting the Schwerpunkt to the Ardennes Hitler set up the conditions for an overwhelming victory that could transform the world.