Hacker News new | past | comments | ask | show | jobs | submit login

I think the most important lesson, it’s borderline impossible to design any good system without clear use cases.

Ukraine has these use cases, also high motivation to tackle them. Ukrainians are controlling battlefield with commodity computers https://en.defence-ua.com/news/how_the_kropyva_combat_contro... They sunk multiple Russian warships with long-range naval drones https://www.bbc.com/news/world-europe-68528761 They recently started large-scale testing of cheap flying drones with computer vision-based target recognition on board https://www.forbes.com/sites/davidhambling/2024/03/21/ukrain...

However, US is at peace. Which is a great thing by itself, but it means it’s too easy for them to waste billions of dollars developing technologies which look awesome in PowerPoint, but useless in practice.




That is absolutely the most important lesson. By the way, also true of non-military software development.


Also .. I think that the Ukrainians are testing the prototypes on the battlefield and rejecting designs that don't work quite early. I have seen a prototype of a machine gun with auto tracking (reminded me of Aliens 2). Also the flying drone designs are made my a large number of companies to avoid the risk of one company being destroyed by a russian missile strike. I would assume that this is also common for other products for their military.


> However, US is at peace. Which is a great thing by itself, but it means it’s too easy for them to waste billions of dollars developing technologies which look awesome in PowerPoint, but useless in practice.

It's always easier to develop weapons in wartime because the requirements and effectiveness are much easier to find, but it's not cheaper. Billions will still be wasted but it will be spent on rebuilding buildings, bridges, infrastructure and lives destroyed by the war.

Ukraine has done some amazing things with cheap and boot strapped technology but the cost is the $486 billion required to rebuild the country.

https://www.reuters.com/world/europe/ukraine-needs-486-bln-r...


> However, US is at peace.

This has always been a difficult concept for me given that we have decided to maintain a very large standing army since WWII. Where is the line really drawn between being prepared for imminent war and being at peace?


Si vis pacem, para bellum. This long period of global peace wouldn't be possible without the mutually assured destruction of nuclear conflict and the certainty that no other nation-state could challenge the hegemon and it's allies in conventional warfare.


> but useless in practice.

we are seeing them actively used, in practice, now. In Ukraine. And they work

Like, WW3 quantities of cluster munitions, destined to be decommissioned and thrown out, handed over to the AFU. aging Bradleys, Javelins, Stingers, etc., designed to blow up T-72s and Hind-Ds -- and boy howdy, that's what they're doing. wait until you see what the "awesome in powerpoint" stuff can do.

and remember, a sizable chunk of Ukraine's military effectiveness is NATO intelligence sharing. of those combat controllers and naval drones are sideshows without NATO mapping of Russian EW, ship, and troop movements.


This was a huge problem for the Nazis too, Hitler loved hugely complex and massive “super weapons” and wasted immense amounts of money and scientific effort to build them. The allies built practical and easy to maintain equipment in great quantities.


The allies also had low tech solutions that helped greatly. One such example is the Ghost Army which used decoys and the like to make it look like there was a large force.

https://www.nationalww2museum.org/visit/exhibits/traveling-e...

Last week, surviving members of the Ghost Army were honored in DC being awarded the Congressional Gold Medal.

https://www.npr.org/2024/03/21/1239871379/ghost-army-congres...


Reminds me of the time the allies literally dropped half sized fake soldiers from planes before Dunkirk or something like that.


Right before D-Day: https://youtu.be/tm2oewPDwpw


I mean... the Allies also spent billions developing a superweapon. (And used German scientists to do it!)


And it wasn’t even the most expensive. The Norden Bomb Sight cost slightly more than the Manhattan Project. B-29 development and production cost nearly 3x the cost of the fission bomb.


The Norden stands out because it couldn't see through clouds, and Europe has very few cloud-free days. So it turned out to be largely useless in practice. The US didn't get much value for its money with that project.


Well, if you include the cost of decontaminating the Hanford site, amongst others, the numbers grow rapidly. Once the B-29 was done, it was done.


Sure, that’s true. I forgot to mention that most of them never saw action except the V2, which was only mildly effective (more of a psychological weapon than anything).


The material effect of the V2 was not in the destruction the V2 caused. It was in the massive diversion of Allied resources trying to stop it.

See "Impact" by Benjamin King

https://www.amazon.com/Impact-History-Germanys-V-weapons-Wor...


The Allies would have won without the superweapon though (remember, Hitler had already surrended and Japan was clearly on the ropes well before Hiroshima), and the jury is still out in whether it even sped things up.


It clearly sped things up.

"Downfall" by Richard Frank

https://www.amazon.com/Downfall-End-Imperial-Japanese-Empire...

"Code-Name Downfall" by Thomas Allen

https://www.amazon.com/Code-Name-Downfall-Secret-Japan-Dropp...


im not buying books to understand your point.

summarize those please


The second bomb convinced the Japanese to immediately surrender.


It took 5 days from the 2nd bomb to surrender, and many historians think the Soviet Union's simultaneous declaration of war was a more significant factor.


This theory is debunked by the two books, written by two different historians, which go into it in great detail.

The second bomb made it clear that the first one was not a one-off, and that the US was going to nuke the cities one by one. The Japanese also had intelligence (that turned out to be false) that Tokyo was the next target.

I've read a couple accounts by anti-nuclear activists who held that the USSR was the reason for the surrender, but if you compare those accounts with the ones written by historians, the former are crackpots.

An invasion of Japan would be an absolutely massive operation (see D-Day) and the USSR was in no position to mount one.


For anyone who wants to understand this debate better, the popular and academic Japanese record goes under the title “Japan’s Longest Day”.

There’s a minute-by-minute historical analysis[1], a 1967 film[2] (starring Toshiro Mifune! Gotta find this one…), a 2015 remake[3] of the 1967 film, and apparently a forthcoming graphic novel[4].

Fundamentally, the idea of “Japan” making a decision to surrender the way (say) Truman made the decision to drop the bombs is a misleading framing.

At this time, political, military and—crucially—effective police power in Japan was distributed among individuals and groups, notably the young officer corps, with very different motivations, beliefs, and principles.

The atomic bombs, the Russian invasion, the particulars of the negotiations with the US over terms of surrender… all were “merely” external forces influencing a chaotic, unstable equilibrium.

Ultimately, in some combination those forces tipped the center of that power from one equilibrium: “The war is lost, but if we surrender now internal forces will destroy Japan as a nation even if the Allies don’t.”

…to another: “The Emperor must make an extraordinary intervention to end the war immediately.”

And it was a most close run thing!

[1] https://www.tohokingdom.com/books/japans_longest_day_kodansh...

[2] https://www.imdb.com/title/tt0062041/

[3] https://youtu.be/tDgQqnDKrdI

[4] https://greenbeanbookspdx.indielite.org/book/9784805317792


Greetings from Ukraine, country at war with Russians, who thought they are genuine descendants of USSR.

Long before Ukrainian war, I've many times talked with Russians about bombs used on Japan.

And now I must say you very important thing - Russians are so crazy anti-humanists, that this really could be reason for fears of Japanese about USSR invasion.

To be honest, I think bombs was enough to intimidate Japanese, but I think, even without bombs, Russians behavior at war, with US Land-lease technical/economical support would be enough to convince Japanese to surrender, may be later, sought.


The has been a ton of debate since the war over whether Japan would have surrendered, and if so how early. The concern at the time, and it has always seemed reasonable to me, was that the Japanese were committed to fighting to the last person and to make them surrender through combat on their home turf would have killed many, many more than the two nukes did.

I don't raise that as justification and personally wish we were never stupid enough as a species to build such a weapon, but we tend to be that stupid. I do, though, agree that we likely would have lost more people on both sides and for Japan that number still would have included a large number of civilians.


I agree, it was totally reasonable and worth it.


Oh I didn't meant to imply that I personally see the nukes as having been reasonable or worth it.

Frankly, I don't know how one could ever make the decision that killing 100,000 is "worth it" and I hope I never have to.

Personally I think we should never have tried to invent the nuclear bomb to begin with, avoiding the decision entirely. I understand the whole "but then the enemy would have it first" argument, I just don't buy it. Sure, maybe the "enemy" would go on to invent it but that's a burden they'll have to bear.

Sometimes standing on principle includes dying on principle, we seem to have lost the importance of all that along the way. I chalk that up to the increase rate of invention making it too scary to take a step back, even for a moment, to decide whether we should do something that we know we can do.


I always saw the atomic bomb as more of a defensive rather than offensive tactic. We were super worried about the Germans getting there first and wanted to ensure we could respond in kind of they did


And then germany surrendered and it was still dropped. Twice.

Doesn't hold.


Japan was never going to surrender. They were going to fight until the end. More lives would have been lost. The bomb saved lives.


It was really aimed at "allies" (soviet union), not japan.


We had really, really bad aim if those two nukes were aimed at the Soviet Union.


allegedly


You either have no knowledge of the topic or have some secret source of information that has evaded the world's historians, because it is a fairly acknowledged fact supported by both Allied and Japanese sources. Japan didn't even surrender after the first bomb was dropped.


I think there's nuance here that gets lost in the retelling. From what I learned of it in a university course dedicated to many aspects of the topic of that bomb, there was a demand of /unconditional/ surrender but Japan wanted to keep their emperor. The emperor was really more of a cultural and spiritual persona than a political one, but regardless the US gov't. insisted on an unconditional surrender, including dethroning the emperor. I think there was an offer of surrender by the Japanese if they could keep their emperor. I don't have proof handy and I'm not inclined to dive down that particular rabbit hole right now so I hope someone can support or correct this.


I vaguely recall hearing something similar, with the reasoning being that there was a fear of future hostility enabled by Emperor driven fanaticism. That said, I've also heard that there wasn't really enough time given for a response after the first bomb, and that it was largely a political move to claim they'd offered an initial surrender - and that the goal was always to drop two bombs, partly because they wanted to test out different aspects of their designs.


The allies had their own set of "super weapons", like radars and proximity fuses.

The Nazis had the issue that they wanted to field massive superweapons, but were nowhere near as mechanized as the allies, leading to them being unable to actually practically support those superweapons (and probably also why they went with such over-the-top ideas, hoping that they could do the job with a few units only and relying on scaring and demoralizing the allies into submission).




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: