There year is 1938. The United States declares themselves neutral and isolationist in regards to foreign affairs

The most important day in WW2 was december 7, 1941.

Goes exactly as it did, as US was directly attacked at Pearl Harbor anyway.

A better way to sidetrack the history is :
- Japan doesn't join the Axis
or
- US declares themselves neutral to the affairs of Europe.

In which case Britain falls or succumbs eventually, Germany and USSR make peace because of the stalemate in the eastern front and maybe the war spreads to middle east cause it's the nearest place to fight for.
And maybe Germany makes Paris its new capital.

>The soviets still steamroll europe because muh steppes and million-man zerging.
>Soviet control over whole of Germany.

Soviet union without american resources = not going to accomplish shit

>Germany attacks USSR
>Japan refuses to help
>Japan attacks the US
>Germany promptly declares war on the US

Was Hitler a literal retard? Why didn't he abandon the Japs after they refused to participate in the Soviet war?

Italy would eventually win in North Africa.
Soviets would have some issues for lack of support from US of A
We'd all be fucking commies.

They had already tried to and they were btfo, japan would be shooting themselves in the foot if they tried to poke the USSR from the east again. They knew they'd lose.

en.wikipedia.org/wiki/Battles_of_Khalkhin_Gol

en.wikipedia.org/wiki/Soviet–Japanese_border_conflicts

I'm not asking about the Japs, I'm asking about Hitler. Why did he stick with them, why did he declare war on the US?

Yeah it does seem stupid.
Maybe someone has insight on that.

Hitler knew almost nothing about America, he viewed it as a weak and degenerate culture that posed no threat, he dow'd them because he didn't think it would make any real difference but it looked good for his allies to see him honouring the pact of steel.

tl;dr- yes he was a retard.

>Hitler knew almost nothing

Sounds like you know nothing about Hitler, he was a downright obsessed Ameriboo in his early days, although a lot of that can be attributed to reading Karl May as a kid.

Not even him, but the two statements don't contradict at all.

Take your stereotypical weeaboo. Said weeb is obsessed with Japanese culture. He also, very likely, knows extremely little about actual Japanese culture, instead focusing on his own distortion of it.

Germany and Japan wipe out the Communists, Eastern Europe embraces Capitalism.

The US fairs even better economically than they originally did.

Australia & the UK are whooped in the pacific, leading to a suing for peace.

China has a nationalist revolution for independence. Germany controls a state roughly the size of the holy roman empire at its height, the pope declares him emperor.

The fascists in Spain win with the help of the Nazi's & fascism rules Yugoslavia. Slowly Liberalism begins to emerge as dominant.

>SJWs?! what?

besides what was already said about Hitler underestimating the US, the US were also in some ways already participating in the war before pearl harbour. see the greer incident which lead to the shoot-on-sight-order by roosevelt basically saying to shoot any axis ship in american waters on sight. (not a wehraboo saying hitler was right, but saying the relations were already extremely hostile so war was close no matter what)
en.wikipedia.org/wiki/USS_Greer_(DD-145)

How costly for Germany would Operation Sealion have been, if it had gone ahead?

Very. They just couldn't do it.

Not that costly. It would have failed, mind you, but it wouldn't have crippled Nazi Germany for the same reason it could never succeed: Germany couldn't project the right kind of power onto the British isles, and didn't have enough sealift to bring enough troops over to make things work.

So it would have cost them most of what little transport vessels they had, and a bunch of their planes, and the 2-3 divisions they could likely attempt to propel over the channel would have gotten mauled, but that would be about it.

We wouldn't give up 100 years of trade with China so the Japanese can develop an autarky .
Even if we weren't giving aid to Britain we would still sell to them and lose lives and property to uboats. The north atlantic would still be a battle ground, but we would eventually get dragged into the war.

The US was a defacto belligerent against Germany. We were supplying the UK and USSR for free and in a destroyer vs U-boat Shooting war with the atlantic. War was inevitable at that point.

I looked at the first battle, it looks more like a stalemate than your "btfo" assessment. The japs were lacking the much needed hardwares.

This. US declaring themselves "neutral" is a bullshit as always. They've been in the war and doing many things to provoke the Nazis/Japs. You would have to have the US actually not do the blockadages, not engage the Germans in the Atlantic, not offer the Allies war supplies, protection, etc for anything meaningful to change.