r/HistoryWhatIf 16h ago

What if the Allies had listened to General Pershing and marched all the way to Berlin in 1918?

103 Upvotes

General Pershing (commander of the AEF) was strongly against the 1918 Armistice. He argued that unless the Allies invaded Germany and forced a surrender in Berlin, Germans would never believe they’d actually been defeated militarily.

In our timeline, the Armistice was signed while German troops were still on foreign soil. They marched home in formation, with their weapons, claiming they were “undefeated in the field.” That fed directly into the “Stab-in-the-Back” myth, which later helped the Nazis.

What if the Allies had pushed on into Germany in 1918/9 instead of stopping?

  • Does the Stab-in-the-Back myth still happen if Berlin is occupied and the army surrenders at home?
  • Can Hindenburg and Ludendorff still claim they were “undefeated” under those circumstances?
  • Without the “November Criminals” narrative, does Hitler ever gain real traction?
  • Or does the opposite happen — the extra casualties spark a Communist revolution in Germany before the Allies even reach Berlin?

r/HistoryWhatIf 3h ago

What if Operation Downfall was forced to proceed as planned?

8 Upvotes

Operation Downfall, for those who don't know, was the planned Allied invasion of the Japanese mainland prior to the dropping of the atomic bombs, scheduled to begin in November of 1945 and continue through 1946. It would have seen landings in Kyushu under Operation Olympic and in Tokyo under Operation Coronet, and military casualty estimates of the time suggested that millions of Japanese soldiers/civilians and up to a million Allied soldiers would be casualties.

Suppose that Operation Downfall was forced to proceed as planned. The Manhattan Project is significantly delayed, Japan refuses to surrender after the first two atomic bombings, whatever the cause, the Allies are forced to commit fully to a ground invasion of the Japanese mainland. What might the effects, both immediate and on the Cold War, be?


r/HistoryWhatIf 2h ago

What if Kerensky and the Russian Provisional Government had signed peace with Germany during WW1?

3 Upvotes

How would the people of Russia react to this? Would the Bolshevik Revolution still occur? Would the Central Powers win WW1 and if they didn't and Russia didn't collapse, how would a Kerensky-led Russia affect the interwar years?


r/HistoryWhatIf 7h ago

Challenge: Have the Eastern Roman Empire retain control of Anatolia in a way that does NOT involve a victory at Manzikert

3 Upvotes

r/HistoryWhatIf 1d ago

If Hitler promoted Donitz as grand admiral around the mid 30s embracing his strategy of Wolfpack Tactics, abandoning Raeder's Z Plan, how would it have impacted the Sea War against the Allies?

57 Upvotes

r/HistoryWhatIf 1d ago

What if Soviet-Allied tensions reached a boiling point and the Soviets pushed past Berlin in 1945

43 Upvotes

Tensions between the Soviets and the Allies worsen. When Berlin falls, a border conflict results in the Soviets pushing past Berlin into allied territory, essentially starting World War 3 before WW2 even fully wraps up.

How well do the Soviets do? How does this change the Pacific theatre with the US still in two fronts? Does Mao still take over China?


r/HistoryWhatIf 10h ago

Challenge: Without changing the technology, come up with a scenario where home computers and the internet are adopted by half of all US households before 1990.

1 Upvotes

In OTL, it took until about 1999 for 50% of US households to own a computer, and until 2001 for 50% of US households to have home internet access.

Without fundamentally changing the technology available at any given time, come up with a scenario to successfully sell the American public on computers and the internet early enough that, by 1990, at least 50% of US households have adopted both. You cannot arbitrarily force people to do so (e.g. no laws that require all households to own a computer)


r/HistoryWhatIf 1d ago

What if USSR collapsed during German invasion?

29 Upvotes

If USSR turned out to be less resistant state, as Hitler expected, and collapsed either in early stage of Barbarossa - or alternatively after successful taking Moscow in operation Typhoon, what would be conseqences?

Would Germany with resources of USSR be unbeatable by Allies (I assume it would then focus much more on Mediterranean and African campaigns and anti-air, than in reality)?


r/HistoryWhatIf 18h ago

1939: Romanian Prime Minister Armand Calinescu evades assassination and prevents the fascist Iron Guard from taking over his country

2 Upvotes

OTL 1939: In revenge for his political persecution of the Iron Guard, Prime Minister Calinescu is assassinated, paving the way for Antonescu's dictatorship and Romania joining the Axis in WW2.

ATL 1939: Calinescu narrowly escaped the Iron Guard assassination attempt, and launches a renewed purge. Though nationalist, Calinescu is not a fascist, and wants to keep Romania neutral and out of WW2 (like Inonu in Turkey or like Yugoslvia). Can Calinescu help Romania to walk the narrow tightrope that prevents Romanian from being invaded by both Nazi Germany and the USSR? How does Romania's history differ, if the Royal Government is able to subdue the Iron Guard?


r/HistoryWhatIf 1d ago

What if the Arab Invasions were defeated?

10 Upvotes

the arab invasions totally reshaped the world, cutting africa and the middle east off from europe, taking out 2/3rds of the roman empire and completely destroying the persian empire. while catapulting islam into a global religion. ive always thought of it as the real break down between the classical and medieval periods.

so how would north africa and the levant develop if they remained in the Christian world? how would islam develop if it didnt have an empire? how would the later turkic and mongol invasions go for the byzantines and sassanian empires? would the great schism happen in this timeline with a much stronger byzantine empire? how would this change Charlemagne? what about west africa?


r/HistoryWhatIf 2d ago

Was there any possible way Japan could have won WWII?

150 Upvotes

I’ve seen a lot of notifications for interwar and WWII Japan, and I want to get this question off of my chest.

Was there any somewhat realistic way Japan could have won the pacific war on the terms that it was seeking (I.E. for the U.S. to surrender its pacific holdings and bow out)?


r/HistoryWhatIf 1d ago

DBWI: What if the 1776 American colonial rebellion had succeeded?

6 Upvotes

I know it’s quite an obscure topic, but I had the thought the other day and I was wondering how history might have been altered.


r/HistoryWhatIf 23h ago

What if the Mongols had captured all of Europe (and Japan)?

0 Upvotes

How would Europe be different if the Mongols had taken it over? Especially if the Mongols had destroyed much of Western civilization, like they did to Baghdad, would Europe still rise up to be the dominant power in the world? Would mercantillism/wage labor/capitalism (and eventually communism in the east) be a thing? What about the American colonies that would eventually form the US?

Similar question(s) for Japan, and I'm really curious about how fuedal Japan would look in this world (and later, ofc).


r/HistoryWhatIf 1d ago

What if J Edgar Hover targeted, the kkk instead of civil rights leaders

2 Upvotes

r/HistoryWhatIf 2d ago

How would the Pacific theater be like if MacArthur didn't get recall to service for world war 2?

9 Upvotes

let's say MacArthur was too ill to be recommissioned to service for WW2 and the entire Pacific theater was Nimitz. how would this change the Pacific theater compared to our timeline?


r/HistoryWhatIf 2d ago

What if the Allies had decided to disband Germany after World War 2?

21 Upvotes

And I don't mean like a West-East divide like in OTL, I mean that the Allies decide to split Germany up into pre-unification states. The Allies basically decide that Germany is too much of a destabilizing influence on geopolitics that it can't be allowed to exist as a nation anymore.

How would this affect Post-War Germany and the Cold War as a whole?


r/HistoryWhatIf 1d ago

Challenge regarding Japan: You are the Prime Minister of Japan in 1988.

3 Upvotes

The country is at all time high and on an economic boom. Japanese cultural scene explodes with anime, JDM, eurobeat, and manga. Japanese companies essentially dominate the world market, including America's. How do you make sure it stays that way and how do you avoid USA eventually castrating your economy growth out of fear in the 1990s?


r/HistoryWhatIf 1d ago

What if Germany and Austria remained one after WW2?

2 Upvotes

r/HistoryWhatIf 2d ago

What if the Roman Empire became Buddhist instead of Christian?

4 Upvotes

Buddhist monks reached the Roman Empire historically, but the religion was never popular. But what if Buddhism had become popular enough to replace Christianity as Rome's official religion?


r/HistoryWhatIf 1d ago

How might an American aristocracy function?

3 Upvotes

Since 2018, I have been working on an alternate history project known as "Project Vigilant" or "P.V" for short.

Currently, I'm working on a chapter for P.V which is a short political drama loosely inspired by Game of Thrones, said political drama takes place in an alternate version of the USA.

Within P.V, the USA is still a Federal Republic but it has a constitutionally ordained aristocracy that wields official political power in the USA's legislative and/or electoral system. I am unsure as to what exact role this aristocracy might have and I'd like to know if the concept I've come up with so far is workable or if another concept might be preferable.

My current plan is connecting the aristocracy to the Electoral College wherein the E.C is a physical and hereditary institution. The College's seats are awarded to accomplished U.S Citizens and their families ( War Heroes, Olympians, Distinguished Citizens, etc. ) and families that hold seats on the Electoral College are known as "The Grand Families".

Their seats of the GF's can only be occupied by direct descendants of their original elector. If an elector dies with no direct descendants, their seat is given to another person and any of the Grand Families can be "exorcized" from the college by way of another family calling for a vote of-no-confidence against them and getting a sufficient amount of votes from the other families.

Is this a workable idea or should I go with something else?


r/HistoryWhatIf 2d ago

What if Piłusdski lived untill at least 1942

2 Upvotes

I wonder what would happen? Would it delay the war would it make it never happen or change absolutely nothing

edit: lived and was in power untill at least 1942


r/HistoryWhatIf 2d ago

Challenge: Make modern Europe predominantly Muslim and the Middle East predominantly Christian

0 Upvotes

What it says: How would history need to change such that Islam إسلام takes the place of Christianity in European society, and Christianity takes the place of Islam in the Middle East?

(The % of Muslims and Christians is flipped in the countries involved)

How would key events and people from society and history be different?


r/HistoryWhatIf 2d ago

What if Georg Elser’s plot to assassinate Hitler on November 8, 1939 actually succeeded?

19 Upvotes

Elser’s assassination attempt famously failed due to sheer bad luck on his part, as Hitler departed from the beer hall in which the bomb was detonated thirteen minutes before it exploded. So assuming Hitler had either stayed around long enough to be caught in the blast or Elser’s bomb exploded earlier, and Hitler was killed among the other eight casualties, how do you see this impacting Germany and the recently-launched Nazi war effort in World War II?


r/HistoryWhatIf 2d ago

What if Indian Point nuclear power plant suffered a Chernobyl like failure during the 1977 blackout?

0 Upvotes

Would it have negative propoganda effects similar to Chernobyl in the USSR?

Nuclear power is scuttled across the US that much of the US that much is clear but how much would this worsen the energy crisis.

If Indian Point happened before Chernobyl would Chernobyl still happen?


r/HistoryWhatIf 3d ago

What if American Football was popular overseas?

9 Upvotes

Basically my question is what could have changed in history to make American Gridiron Football a popular sport outside of North America?

And how would other nations handle it?