What if Japan attacked the Dutch East Indies in 1936?

If the Japanese were smart they would declare all preexisting deals with foreign businesses would be honoured, and try to encourage further investment. Even dutch ones, if they would sign an armistice.
And all Europeans would be treated very politely.
Of course that assumes a level of control over their soldiers conduct that they didn't have irl.
If Japan would do that, what would be the point of the occupation? Furthermore, I doubt that imperial Japan was ideologically able to make such a promise, let alone fulfill it.
Just the sheer distance for any land based air unless the Japanese have bases much closer than I'm aware of.
Ah, in that regard you mean. The range of Japanese air-units in late 1941 was amazing, I don't know if that was the case in 1936. Regardless the Japanese forces are bound to capture airfields in the DEI. Wouldn't they ferry airforce (or better said, Army-aircorps) planes to those fields to use in operations?
 
There are possibilities of less totallistic objectives though. In fact, one of the greatest fear of the Netherlands was that Japan would perform a coup de main attack on one or more oil ports, like Tarakan or Balikpapan (though Batavia was certainly a feared option as well).
Interesting idea - at what points in time did the Dutch ever articulate such fears of a potential assault like this? When was the earliest point?

What sort of approach did the Dutch authorities and military think Japan would take in the aftermath of a coup de main attack on one or more oil ports? Set the stage for diplomatic negotiations and some sort of settlement? Consisting of what, some sort of ownership stake and right to a protective garrison? Some guaranteed delivery schedule? Other economic concessions on opening the market to Japanese exports, business and immigration? What permanent enforcement mechanism did they think the Japanese might have in mind?

Did the Dutch feel they might have to just suck up a coup de main and only mitigate it diplomatically, like a hostage negotiation? Fight with no thought or word of concessions or tributes? Or wait and see how strong local forces would be and how much help the Netherlands could attain in the region?

What type of force, with what type of logistic footprint, would it take to execute a "bolt from the blue" coup de main on Tarakan, or Balikpapan, or Batavia? And how detectable would it be in advance? And could it credibly hold any of these locations for a substantial amount of time, without a broader attack, to prevent an effective Dutch counterattack and siege for awhile, and certainly guarantee the destruction of property in the course of military recovery operations?

What about a coup de main executed after contentious trade talks that break down, so there is less surprise as a tactical and strategic advantage for the Japanese, but the attack seems a little less bizarre.

If the Japanese were smart they would declare all preexisting deals with foreign businesses would be honoured, and try to encourage further investment. Even dutch ones, if they would sign an armistice.
And all Europeans would be treated very politely.
I agree

Of course that assumes a level of control over their soldiers conduct that they didn't have irl.
It may be much more possible than you think, especially the more Navy-dominated compared to Army-dominated the operation is. The Navy was more civilized, westernized, less peasant, less brutalized by its officers, and less eager to keep that shit rolling downhill onto others. Its officer corps had a decent English-language proficiency. Against the Dutch alone, the Special Naval Landing Forces, ground forces under the Navy Ministry and General Staff in their service, could do a majority of the ground combat work.

Additionally, while the Japanese military in the first half of the 1930s was taking increasingly out of control actions to 'slip the leash' of civilian control, including going on unauthorized adventures and invasions abroad, and assassinating politicians and higher-ups who were failing at patriotic, in their foreign operations they were not being any more brutal than most countries forces on colonial expedition, or bloodthirsty than local Chinese warlords. The atrocities intensified from the fall and winter of 1937, as outrage grew in Japan that the Chinese were *daring to resist* and not behaving *as expected* and simply complying, surrendering, defecting, or retreating, and the war was becoming a much tougher, deadlier slog than they were bargaining for, not the fun, easy, adventure the Manchuria incident had been.

Against a western opponent, the Japanese would not expect meek submission and easy buyouts they would expect from Chinese, and stand-up resistance would not surprise or outrage them nearly as much. Atrocities could and likely would escalate the longer a war goes on, but combat and PoW and western internee treatment would likely start out more professional. It is notable that even after atrocious habits became routine in the IJA in China, the Japanese and Soviets in the border clashes that escalated to the Nomonhan border war, were professional in their treatment of each other's PoWs and the rare civilians encountered.
 
Ah, in that regard you mean. The range of Japanese air-units in late 1941 was amazing, I don't know if that was the case in 1936. Regardless the Japanese forces are bound to capture airfields in the DEI. Wouldn't they ferry airforce (or better said, Army-aircorps) planes to those fields to use in operations?
He sounds like another one who just read the title, ignored paragraphs in the original post, and ignored the existence of the Mandated Islands in Micronesia that offer preexisting airfields for the Japanese.

Your bolded point is exactly right, people, perhaps out of respect for logistics (which are important!), or *initial* operational dispositions (which also are important!) sometimes really, have way, way, too little operational imagination, put too little thought into operational problem solving and and how phasing and sequencing makes military operations work and it is how enemies can surprise and threaten you. Am I right @Carl Schwamberger?
 
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I mean either way if the Japanese succeed in this then things leading up to World War 2 are going to be vastly different. For starters the Dutch are going to have a worse time overall with the lose or at least the demands to play by the Japanese whims which is going to do a number on their economy even if Japan allows them to keep influence on Indonesia. It would seem like the Dutch would overall be weaker in Europe as well as they would have gained a major lose making them less willing to actually go to war which might see the Dutch for increasing demands for neutrality in any war or even early surrender in any war.

The British and French have to deal with the rise of Japan and have to defend their Asian/Pacific territories which is going to make it that much harder to rearm and defend against any major player in Europe.

Germany and the Soviets are going to take advantage of the situation and a more diverted France/Britain and try to gain further influence on the continent although I have no idea how the Japanese occupation of Indonesia would affect them. I guess Germany would seek earlier cooperation with Japan as a way to access their resources while the Soviets will try to keep Japan neutral to avoid losing further access to the Pacific.

What happens in China is going to depend a lot on a lot of factors so who knows what will happen there. While Japan will have more resources they will also have to occupy Indonesia but they will also have more experience. A greater possibility for naval invasions of China would make sense since Japan has a greater strategic advantage now but who knows.
 
Interesting idea - at what points in time did the Dutch ever articulate such fears of a potential assault like this? When was the earliest point?
From the late 19th century out. This was in part caused by the military weakness of the Dutch forces in the DEI. A deliberate attack was unstoppable, while a defense against a coup-de-main had some chance of succeeding, so the latter was chosen as the most likeliest scenario. In my TL (SHAMELESS PLUG) I describe the debate on the defense of the colony in detail.
What sort of approach did the Dutch authorities and military think Japan would take in the aftermath of a coup de main attack on one or more oil ports? Set the stage for diplomatic negotiations and some sort of settlement? Consisting of what, some sort of ownership stake and right to a protective garrison? Some guaranteed delivery schedule? Other economic concessions on opening the market to Japanese exports, business and immigration? What permanent enforcement mechanism did they think the Japanese might have in mind?
Generally the fear was that after the capture the Japanese occupation would be fait accompli. Foreign intervention would still be possibility but the chance on that would be much diminished. The aftermath would be out of the military's hands so didn't get much attention. The Foreign office mainly considered the whole thing unlikely and was convinced the British - if not other powers - would not let it happen (after the end of the Anglo-Japanese Alliance anyways).
Did the Dutch feel they might have to just suck up a coup de main and only mitigate it diplomatically, like a hostage negotiation? Fight with no thought or word of concessions or tributes? Or wait and see how strong local forces would be and how much help the Netherlands could attain in the region?
The military sure didn't. The KNIL realized it was only really able to fight a battle on Java, with forces in the Outer Regions stationed there for police-purposes and to serve as trip-wires. The KM on the other hand was being build - after WWI - to counter the coup-de-main through concerted submarine attacks.
What type of force, with what type of logistic footprint, would it take to execute a "bolt from the blue" coup de main on Tarakan, or Balikpapan, or Batavia? And how detectable would it be in advance?
Good question. It may help to look at what the IJN/IJA used in 1942 to conquer Tarakan and Menado. These would also be the most dangerous attacks from a Dutch POV, as the chances to detect the opposing force in time for the submarines to concentrate and attack the invasion force would be greatly diminished, while a coup-de-main on Java's ports would be much easier to intercept. An important factor will be the level of surprise the Japanese are able (or willing!) to achieve.

A total 'bolt from the blue' attack on Tarakan would mean that the DEI government doesn't suspect any Japanese shenanigans at all and the garrison is in complete peace-mode. There will be some guards posted but most probable barely any crewed naval guns. If a Japanese invasion fleet backed by heavy cruiserw comes thundering in port at midnight the whole operation could be over before morning light. There are a few caveats though:

- Is the Japanese government willing to alienate the international community this much this early?
- Is the Japanese navy willing to capture Tarakan without first securing it's SLOCs by the capture of Menado? In WWII the offensive of the DEI was planned to be quite methodic in its nature.
- Are the Japanese able to keep the operation secret enough?
And could it credibly hold any of these locations for a substantial amount of time, without a broader attack, to prevent an effective Dutch counterattack and siege for awhile, and certainly guarantee the destruction of property in the course of military recovery operations?
There will not be a Dutch counterattack that's for sure. Neither the KNIL or the KM were set up for that. Any counteroffensive will need direct foreign involvement. At least for places like Borneo, Celebes or the rest of the Outer Regions. Java or Sumatra is a different story, but certainly not completely.
What about a coup de main executed after contentious trade talks that break down, so there is less surprise as a tactical and strategic advantage for the Japanese, but the attack seems a little less bizarre.
More likely, still means the UK and others will be upset.
The Navy was more civilized, westernized, less peasant, less brutalized by its officers, and less eager to keep that shit rolling downhill onto others. Its officer corps had a decent English-language proficiency.
Meh, I have my doubts about that. The history of WWII is rife with IJN autrocities. IMHO the difference is mainly one of opportunity. The nature of naval warfare lends itself less for large scale autrocities.

In fact, wouldn't a more crazy IJN help this scenario? What if the Navy pulls a 'Marco Polo bridge' by staging a coup-de-main attack without the government knowing about it?
Against the Dutch alone, the Special Naval Landing Forces, ground forces under the Navy Ministry and General Staff in their service, could do a majority of the ground combat work.
Certainly before an attack in Java that would be the case. KNIL-forces on Java would number some 40,000 though, would the IJN be able to muster a force to defeat that? Having this whole thing mainly be a IJN affair would make this interesting when the UK gets involved and things go South, what would that do to the inter-service war?
Against a western opponent, the Japanese would not expect meek submission and easy buyouts they would expect from Chinese, and stand-up resistance would not surprise or outrage them nearly as much.
See above.
 
From the late 19th century out. This was in part caused by the military weakness of the Dutch forces in the DEI. A deliberate attack was unstoppable, while a defense against a coup-de-main had some chance of succeeding, so the latter was chosen as the most likeliest scenario. In my TL (SHAMELESS PLUG) I describe the debate on the defense of the colony in detail.

Generally the fear was that after the capture the Japanese occupation would be fait accompli. Foreign intervention would still be possibility but the chance on that would be much diminished. The aftermath would be out of the military's hands so didn't get much attention. The Foreign office mainly considered the whole thing unlikely and was convinced the British - if not other powers - would not let it happen (after the end of the Anglo-Japanese Alliance anyways).

The military sure didn't. The KNIL realized it was only really able to fight a battle on Java, with forces in the Outer Regions stationed there for police-purposes and to serve as trip-wires. The KM on the other hand was being build - after WWI - to counter the coup-de-main through concerted submarine attacks.

Good question. It may help to look at what the IJN/IJA used in 1942 to conquer Tarakan and Menado. These would also be the most dangerous attacks from a Dutch POV, as the chances to detect the opposing force in time for the submarines to concentrate and attack the invasion force would be greatly diminished, while a coup-de-main on Java's ports would be much easier to intercept. An important factor will be the level of surprise the Japanese are able (or willing!) to achieve.

A total 'bolt from the blue' attack on Tarakan would mean that the DEI government doesn't suspect any Japanese shenanigans at all and the garrison is in complete peace-mode. There will be some guards posted but most probable barely any crewed naval guns. If a Japanese invasion fleet backed by heavy cruiserw comes thundering in port at midnight the whole operation could be over before morning light. There are a few caveats though:

- Is the Japanese government willing to alienate the international community this much this early?
- Is the Japanese navy willing to capture Tarakan without first securing it's SLOCs by the capture of Menado? In WWII the offensive of the DEI was planned to be quite methodic in its nature.
- Are the Japanese able to keep the operation secret enough?

There will not be a Dutch counterattack that's for sure. Neither the KNIL or the KM were set up for that. Any counteroffensive will need direct foreign involvement. At least for places like Borneo, Celebes or the rest of the Outer Regions. Java or Sumatra is a different story, but certainly not completely.

More likely, still means the UK and others will be upset.

Meh, I have my doubts about that. The history of WWII is rife with IJN autrocities. IMHO the difference is mainly one of opportunity. The nature of naval warfare lends itself less for large scale autrocities.

In fact, wouldn't a more crazy IJN help this scenario? What if the Navy pulls a 'Marco Polo bridge' by staging a coup-de-main attack without the government knowing about it?

Certainly before an attack in Java that would be the case. KNIL-forces on Java would number some 40,000 though, would the IJN be able to muster a force to defeat that? Having this whole thing mainly be a IJN affair would make this interesting when the UK gets involved and things go South, what would that do to the inter-service war?

See above.
Curious - how were the oilfields and oil production distributed throughout the islands of the NEI archipelago.

I got the vague impression, just based on map symbols for oilfields and their density, that they ranked sort of like this:

1) Borneo/Kalimantan
2) Sumatra
3) Celebes/Sulawesi
4) Java
5) all others less, but New Guinea/West Irian next in rank, if any, just from size?
 

Sekhmet_D

Kicked
Meh, I have my doubts about that. The history of WWII is rife with IJN autrocities. IMHO the difference is mainly one of opportunity. The nature of naval warfare lends itself less for large scale autrocities.
Comparatively speaking, the IJA still make them look like choirboys. At least the IJN was headed by people who were outwardly honourable and wished to avoid war.
 
As far as an Anglo-Japanese war…

Japan has only three battleships worked up and active in 1936: Haruna, Fuso, and Yamashiro. Kongo, Kirishima, Nagato, Mutsu, Ise, and Hyuga are all in various stages of working up. Hiei is still demilitarized and OTL would be modernized the next year.

On the British side, Renown, Warspite, and Malaya are stuck in dry dock being modernized. The remaining battleships can be committed as soon as they can be sent east.

While the Brits have numerical superiority the Japanese fleet is ship for ship superior. In particular, Japanese doctrine of sitting at long range is likely to be murderously effective given that most of the British battle fleet’s limited capabilities in that range band.
 

Sekhmet_D

Kicked
In particular, Japanese doctrine of sitting at long range is likely to be murderously effective given that most of the British battle fleet’s limited capabilities in that range band.
I don't know about that. History proved Japanese long range BB gunfire accuracy to be abysmal.
 
I don't know about that. History proved Japanese long range BB gunfire accuracy to be abysmal.
By Leyte, Japanese gunnery skills had degraded for lack of practice, and more importantly, British battleships are larger and less nimble targets than the DDs, DEs, and even CVEs of Taffy 3.
 

Sekhmet_D

Kicked
By Leyte, Japanese gunnery skills had degraded for lack of practice, and more importantly, British battleships are larger and less nimble targets than the DDs, DEs, and even CVEs of Taffy 3.
It wasn't too hot in 1942 in the NEI or at Guadalcanal either. The targets in the NEI were destroyer sized, I'll give you that, but at Second Naval Guadalcanal it was BB versus BB and the Japanese scored only a single hit using their 14 inchers despite their vaunted night fighting expertise.
 
It wasn't too hot in 1942 in the NEI or at Guadalcanal either. The targets in the NEI were destroyer sized, I'll give you that, but at Second Naval Guadalcanal it was BB versus BB and the Japanese scored only a single hit using their 14 inchers despite their vaunted night fighting expertise.
I will admit that 3 hits out of 117 shells fired is pretty sad, yes.

Nonetheless, a greater hit rate can be expected in daylight and open waters.
 
It wasn't too hot in 1942 in the NEI or at Guadalcanal either. The targets in the NEI were destroyer sized, I'll give you that, but at Second Naval Guadalcanal it was BB versus BB and the Japanese scored only a single hit using their 14 inchers despite their vaunted night fighting expertise.
The gunnery displayed at Java Sea was abmysal to be frank.
 
He sounds like another one who just read the title, ignored paragraphs in the original post, and ignored the existence of the Mandated Islands in Micronesia that offer preexisting airfields for the Japanese.

Your bolded point is exactly right, people, perhaps out of respect for logistics (which are important!), or *initial* operational dispositions (which also are important!) sometimes really, have way, way, too little operational imagination, put too little thought into operational problem solving and and how phasing and sequencing makes military operations work and it is how enemies can surprise and threaten you. Am I right @Carl Schwamberger?

Correct. for the better part of 25 years I was paid to study, think about, plan, and execute such operations. The landing operations or beach assault is about 10% of the effort in a brigade, corps, or army size over the sea operation. The rest of the effort is in preparation and follow up. Just loading a ship correctly for shore to shore or a ship to shore oepration. is a unique skill set that ordinary armies, or merchant marine skippers don't have. The 700 or 800 tons per day you need to sustain a small corps of 25,000 or 35,000 men is not the same 800 mix of items you load at the start or load at many points along the time span of a amphibious operation. Screw that up and you lose 12,000+ men to starvation as the Japanese did on Guadalcanal.
 

Coulsdon Eagle

Monthly Donor
Comparatively speaking, the IJA still make them look like choirboys. At least the IJN was headed by people who were outwardly honourable and wished to avoid war.
Hmm... many reasonable folk reckon Yamamoto would have been hanged if he had survived on the basis of the execution of the survivors from USS Edsall, supposedly killed because the Combined Fleet took an age to sink their old destroyer.
 

Sekhmet_D

Kicked
Hmm... many reasonable folk reckon Yamamoto would have been hanged if he had survived on the basis of the execution of the survivors from USS Edsall, supposedly killed because the Combined Fleet took an age to sink their old destroyer.
Reaching like Dhalsim. If anyone would have been sent to the gallows it was Nagumo for being the commander on the spot. Yamamoto had no involvement whatsoever in that tragedy.
 
The gunnery displayed at Java Sea was abmysal to be frank.

Everyones gunnery early in the war was abysmal. Some improved faster than others. One of the reasons Scotts cruiser force survived his October 1942 battle off Guadalcanal was he had put his little group through a crash course in gunnery in the weeks before the fight. For two decades most navies overestimated the value of the training they did do, and fiscally conservative governments underfunded training. Neither the US or Japan were exceptions.
While the Brits have numerical superiority the Japanese fleet is ship for ship superior. In particular, Japanese doctrine of sitting at long range is likely to be murderously effective given that most of the British battle fleet’s limited capabilities in that range band.

I don't know about Brit naval gunnery doctrine. The USN doctrine in that era was to close into midrange as rapidly as possible. A broad midrange band was regarded as the sweet zone. Both for reasons of gunnery with the US 14" & 16" cannon, and the calculations for resistance of the USN standard BB armor. Did the British make a similar calculation?

The surface battle successes of the IJN in 1941 - 1942 had a lot to do with the Type 93 Long Lance torpedo. Those were operational in very limited numbers in 1936. Strip out the hits of the Japanese torpedos in 1942 and the battles outcomes look very different. With that weapon available in limited numbers in 1936 the Japanese will either be overconfident, or have to use more careful and calculated tactics.
 
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As far as an Anglo-Japanese war…

Japan has only three battleships worked up and active in 1936: Haruna, Fuso, and Yamashiro. Kongo, Kirishima, Nagato, Mutsu, Ise, and Hyuga are all in various stages of working up. Hiei is still demilitarized and OTL would be modernized the next year.

On the British side, Renown, Warspite, and Malaya are stuck in dry dock being modernized. The remaining battleships can be committed as soon as they can be sent east.

While the Brits have numerical superiority the Japanese fleet is ship for ship superior. In particular, Japanese doctrine of sitting at long range is likely to be murderously effective given that most of the British battle fleet’s limited capabilities in that range band.
You think Haruna, Fuso & Yamashiro could stand up to Hood, Nelson and Rodney?
 
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