So first of all, hello everyone. This is my first post after making my account over half a year ago and lurking for many years before that. Good to be here.

Now, I've been wondering about the full potential for Japanese expansion if they have a free (or freer) hand in the Pacific. The scenario I have outlined is partly inspired by The Falcon Cannot Hear, it is as follows:

The US descends into a devastating civil war in the 30s (let's assume this comes about like in Falcon; FDR assassinated, etc.), with most of its Navy also participating in the war and tied up in the Carribean/Atlantic, and its Pacific garrisons being redeployed to the mainland. This war disrupts the flow of oil to Japan, who need it for their war in China. Events in Europe are mostly the same, though the democracies more connected with US trade are having a harder time in the Depression. Hitler still makes roughly the same moves he made IOTL, so the West is wary of increasing tension with the Japanese and continue to sell them oil increasingly cheaply, afraid that Japan might swoop in and take their colonies. Meantime, (as in Falcon) Japan invades and occupies American holdings in the Pacific - Philippines, Guam, Wake, Midway, Hawaii (and anywhere else I may have forgotten) with little trouble, as they are lightly defended. Let's say that any US Navy elements not tied up in the war at home are at Pearl Harbor and get annihilated or captured.

Once the war in Europe begins, the Japanese come to the very conclusion the Europeans feared - "hey, we're paying for oil when we could just TAKE it". They invade European colonial holdings, only they have a better starting position from the Philippines. This is what I'm curious about - how successful would Japan be in this alt-Pacific War? They obviously take everything they took IOTL, but I wonder how much further they can go in these regions:

1. New Guinea. Can they take Port Moresby? And if it falls, does that wrap up the whole island?

2. Timor. OTL resistance there continued until '43 I think. Does it end quicker ITTL?

3. New Caledonia, Fiji and Samoa. Does Operation FS go ahead and if yes, how successful is it? If go for it, I presume they also take the Solomon Islands too, as they are in the way.

4. Indian Ocean/India. How different is the Indian Ocean raid and how far into India can they get?

5. Aleutians/Alaska. As I understand it, occupying Attu and Kiska OTL was just a feint to distract from Midway. Would they expand there and possibly further into Alaska if there was no need to distract anyone, but also little forces to resist them if they do?

6. Australia and New Zealand. What exactly would Japan do with these two in this scenario? Will they try to invade?

7: Just how far can Japan get in the Pacific while uncontested on the seas? Can they get all the way to, say, Ducie Island at the very edge of Polynesia? Would they want to?

Feel free to ask for any clarifications.
 
In my opinion, Timor at least would be pacified quicker, and the shorter distance from the Philippines plus the lack of any real resistance on the high seas means less overstretching and supply problems, which would merit a victory at Kokoda and (just barely) Port Moresby for the Japanese. I really have no idea about the other aspects though.

Any ideas?
 
Of the US is in a new civil east then not only are they not checking Japan in the Pacific, they’re not lend-leasing to the UK either. The British Empire is still going to put up as much of a fight as they can and Japan is still going to face the same logistical issues they did before, but it will go much better for Japan regardless.

1-2. I can’t comment on how much the US aided these efforts as Australia is still going to fight tooth and nail to defend themselves.

3. They would go for it and have more success than OTL. Holding them would be annoying so there would probably be just isolated garrisons.

4. Logistics doomed this endeavor and I don’t see that changing.

5. Alaska is a distraction and not really of any importance. They may not be messed with unless Japan wraps up elsewhere and decides everywhere the Pacific touches is theirs.

6. Raids and supply interdiction would be the main strategy. The main centers of both countries are just too far away. The most they would invade would be Darwin, maybe Cairns and Townsville if they are overly ambitious.

7. Ducie Island would be a waste of resources. They would be securing their gains and launching raids on places they can’t invade directly. The ultimate goal would be to force the Allies to the negotiating table from a position of strength.
 
The problem is it would take so many changes to get a US civil war Circa 1920-1940 that is is one step short so ASB
 
The Business Plot may well have come into fruition under President Huey Long instead of FDR.
Again all the actual evidence is that one guy floated the idea of a coup, literally only one person as far as we can tell was connected to this so called plot, and just a mid level bond salesman not someone hugely important
 

rainsfall

Banned
Again all the actual evidence is that one guy floated the idea of a coup, literally only one person as far as we can tell was connected to this so called plot, and just a mid level bond salesman not someone hugely important
Violently overthrowing Huey Long would probably have been much more amenable to the Right than FDR: much of his program was (incorrectly) see as socialist by the American Right, which would have been unacceptable to the major industrialists, e.g. Ford, Hearst etc.
 
Hard to remove the Americans from the picture. The USA has had strategic interest in the Pacific for over a hundred years by that point, directly bordering it with thousands of miles of coastline. Any plausible American regeime is going to be deeply concerned with Japanese moves, regardless of anything else.
 
Violently overthrowing Huey Long would probably have been much more amenable to the Right than FDR: much of his program was (incorrectly) see as socialist by the American Right, which would have been unacceptable to the major industrialists, e.g. Ford, Hearst etc.
Maybe or maybe not, a Huey Long that convinces 2/3rds of Democratic delegates to back him and gets 50% of the electoral votes in the US is either dealing with massively different circumstances than OTL or is a massively different person than OTL
 

rainsfall

Banned
Maybe or maybe not, a Huey Long that convinces 2/3rds of Democratic delegates to back him and gets 50% of the electoral votes in the US is either dealing with massively different circumstances than OTL or is a massively different person than OTL
FDR assassinated in 1933 and Garner decides not to run for re-election in 1936 due to ill health. Voila.
 

rainsfall

Banned
Hard to remove the Americans from the picture. The USA has had strategic interest in the Pacific for over a hundred years by that point, directly bordering it with thousands of miles of coastline. Any plausible American regeime is going to be deeply concerned with Japanese moves, regardless of anything else.
Taft/Vandenburg/Dewey/Wheeler etc. ?
 
The US descends into a devastating civil war in the 30s (let's assume this comes about like in Falcon; FDR assassinated, etc.), with most of its Navy also participating in the war and tied up in the Carribean/Atlantic, and its Pacific garrisons being redeployed to the mainland. This war disrupts the flow of oil to Japan, who need it for their war in China. Events in Europe are mostly the same, though the democracies more connected with US trade are having a harder time in the Depression.
Would the rest of the world not join in at least supplying each side..... it's not 1860 transport is cheap unless USN is dominant and if it is then that side will win quickly, and we get a short war anyway?

Would you not get huge butterflies as GB & Canada (and rest of Europe) might sell and do early rearmament on the profits from 30s US civil war arms sales......
 
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rainsfall

Banned
The American reaction might have been very different, but it is hard to imagine any of them just letting japan do whatever they want.
Without the 1941 oil embargo, it's really hard to see the IJA launching the Southern Resource Zone Campaign away from China...
 
FDR assassinated in 1933 and Garner decides not to run for re-election in 1936 due to ill health. Voila.
No, not Voila. Long can throw his hat in the ring, but he still needs to convince 2/3rds of delegates at the DNC to make him the candidate, rather than someone else like Al Smith, Champ Clark, George White, etc.. Then he has to be able to beat the Republican candidate

The easiest way for him to do both of those is to be much less radical, basically FDR with a Cajun accent

So major changes to the US to get a civil war, probably more major than the changes needed to get Japan to go into a civil war at this point in time, after all Japan even OTL had opposing factions assassinating each other
Without the 1941 oil embargo, it's really hard to see the IJA launching the Southern Resource Zone Campaign away from China...
They still have a reason, same reason they occupied Indochina in 1940, cut off China from outside help. China is getting supplies via the Burma road, ergo they want to cut it, that means war with the British, and if you are fighting them might as well take their valuable colonies at the same time
 

rainsfall

Banned
No, not Voila. Long can throw his hat in the ring, but he still needs to convince 2/3rds of delegates at the DNC to make him the candidate, rather than someone else like Al Smith, Champ Clark, George White, etc.. Then he has to be able to beat the Republican candidate
Al Smith was simply not going to get nominated after his 1928 landslide loss to Hoover. Champ Clark were a bit too dead to be nominated in 1936 and George White had even less support than Long for the lack of better alternatives...

Any GOP candidate is going to lose in 1936, given the 1933-1937 wordwide economic recovery.
The easiest way for him to do both of those is to be much less radical, basically FDR with a Cajun accent

So major changes to the US to get a civil war, probably more major than the changes needed to get Japan to go into a civil war at this point in time, after all Japan even OTL had opposing factions assassinating each other
I mean, right-wing opposition to a Huey Long Presidency alone could vaguely possibly have started a civil war.
They still have a reason, same reason they occupied Indochina in 1940, cut off China from outside help. China is getting supplies via the Burma road, ergo they want to cut it, that means war with the British, and if you are fighting them might as well take their valuable colonies at the same time
Churchill closed the Burma Road in 1940: the 1941 oil embargo was the trigger for war with the West.
 
Al Smith was simply not going to get nominated after his 1928 landslide loss to Hoover. Champ Clark were a bit too dead to be nominated in 1936 and George White had even less support than Long for the lack of better alternatives...

Any GOP candidate is going to lose in 1936, given the 1933-1937 wordwide economic recovery.

I mean, right-wing opposition to a Huey Long Presidency alone could vaguely possibly have started a civil war.

Churchill closed the Burma Road in 1940: the 1941 oil embargo was the trigger for war with the West.
As an alternative to OTL Long? Anyways I meant Bennet Champ Clark, who vied for the nomination in 1932. My point was that Long has to convince two thirds of Democratic delegates to go with him, rather than just pick some random milquetoast or other politician

Against an OTL Long? Potentially with a vote splitting 3rd party run by hardline conservative Dems as Long was not popular? The GOP got 36.5% against FDR, unless Long acts just like FDR, he's not going to get FDR's margins and OTL Long was controversial to say the least

That depends on how Long got the Presidency. If he's basically FDR with a Cajun accent, no more likely than FDR being overthrown

He closed it for three months. While the embargo was the proximate OTL trigger, the IJA still wants China cut off, the embargo just put them on a time limit
 

rainsfall

Banned
As an alternative to OTL Long? Anyways I meant Bennet Champ Clark, who vied for the nomination in 1932. My point was that Long has to convince two thirds of Democratic delegates to go with him, rather than just pick some random milquetoast or other politician
Clark was an AFC isolationist.
Against an OTL Long? Potentially with a vote splitting 3rd party run by hardline conservative Dems as Long was not popular? The GOP got 36.5% against FDR, unless Long acts just like FDR, he's not going to get FDR's margins and OTL Long was controversial to say the least
A 3rd party challenge is far more likely to come from the left, not the conservative democrats.
That depends on how Long got the Presidency. If he's basically FDR with a Cajun accent, no more likely than FDR being overthrown

He closed it for three months. While the embargo was the proximate OTL trigger, the IJA still wants China cut off, the embargo just put them on a time limit
Well, the IJA could have invaded the Southern Resource Zone to cut the Burma Road in 1938,1939,1940. Yet they didn't until 1941...
 
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