How early (month and year estimate) would France have surrendered without American aid and support?
I consider the bonus of American aid short of its DOW not significant enough to bring about a French defeat if removed. However, the entry of the USA very much influenced the events of 1918.
The decisive factor in WW1 is morale. Imagine a map of Europe with a sandclock on each Great Power. Once the sand has trickled down, this nation has lost its will to continue the war and is out. Now some of these clocks trickle faster, some slower. I can think of very few events which would equal the addition of sand...the American entry into the war is one.
Russia's upper half is empty by mid-1917. They went out.
Germany's clock began to trickle increasingly fast after the big offensives failed in 1918. In November, it was empty, the Ottoman and Austro-Hungarian ones were bit
faster.
Now, it is debateable how empty the other Entente powers' clocks were. The French trickled fast when its soldiers went on strike in 1917. The French High Command
undertook a lot of reforms and changes to remove the causes of this soldier-strike,
but it cannot be denied that the idea of a possible victory was very much revigorated with the advent of optimistic American soldiers. So, the French
themselves stopped the acceleration of trickling, but the American entry meant some additional sand.
We talk about 1,000,000 men by the summer of 1918. A number rising by 10,000 each DAY. Now, even on a good day, the German army couldn't kill much more
men than that. Now, World War I is in large parts a game of numbers. Remove a million men (out of promised 5 million IIRC) out of the equasion, and there
will be effects. Will this enable the Germans to "overrun" France?
Certainly not. There is no such thing as overrunning in Western Europe after the 1st Marne. Even if the Germans do better in the last offensives of early
1918 (not because they fight fewer Americans, but because the Entente forces would be spread a bit more thinly), you wouldn't spot the difference in the
frontlines on a map in a history book from this timeline and OTL. The difference might make just one 1km, 5km, 10km, maybe 50. But that's about it. They would most
probably not reach Paris. But they reached neither Petrograd nor Moscow. The Russian clock had trickled nevertheless.
Would a new offensive against France and Britain be thinkable? Yes. Same goes for a prolongation of the war. With America being
a full player in 1919, it was not possible. The OHL relized it, the German soliders realized it, and in the end the civilians as well. The German sandclock
sees avalanches after the summer of OTL-1918.
Now we have to take another things into consideration. Without the additional pressure of the march of millions across the Ocean (the German OHL didn't
take them seriously as soldiers, but even as disposable cannonfodder they wouldn't be much fun for them), the German planning for 1918 might very well
have been different.
Germany had been very much on the defensive on the Western Front since Verdun, even giving up territory in a few places in order to have a shorter,
thoroughly fortified frontline ("Siegfriendlinie"). Instead they took out the weakest links of the Entente. Serbia. Romania. Surprisingly - Russia.
Now the logical next step would have been Italy. In late 1917, they took a severe beating in the battle of Caporetto, for a while, the Italian sand
trickled very very fast.
A successful offensive on the maximum scale the CP were capable of with massive German support might have forced the Italians to evacuate Venetia.
A frontline on the Po river or the
Adige river and alongside Lake Garda would be a dream, it would massively stabilize Austria-Hungary. If Italia goes back to neutral in such a situation,
that would be even better.
But the AEF poured into France. In full strength, it would seriously tip the balance and make a German victory impossible. The German OHL feared that
a victory in France in 1918 through offensive means was possible and necessary. The offensives were spectacular, but burned down Germany's reserves of
any kind. In the end, they were a blunder; a blunder France and especially Britain could exploit during the 100 days - also because they could by then
pass calmer sectors of the Western front on to the Americans.
Now I won't directly make a prediction when France would collapse without the American entry. I admit that the Entente still stands a good chance to win
the war, maybe this chance even stands at 70 or 80%.
But I could imagine Italy to be out by September 1918, if seriously beaten by a German offensive into Venetia (Germany being on the defensive, giving
up very little, on the Western Front).
For France and Britain at this point of time, there would be little reason to expect victory soon. They would be the only two Allies left. They would
be in some financial trouble.
In 1919, I expect Germany on its last two legs, but it probably would stabilize Anatolia, develop Anti-Tank tactis and still deny the Entente really
big gains in Belgium and France. Maybe it would make diplomatic offers (it should!).
The sand in the French and German clocks would both be very, very low when summer 1919 comes.
And would Britain really follow behind them, just seeking an armistice?
Britain would play for time a little to show the victory-drunk Germans that things wouldn't be all to easy. Maybe there would finally be several
naval clashes. There would be long talks with the American ambassador. I reckon that these would be decisive. If the US enters the war, there would be
another round.
In WW2, Britain fought alone...for a while. Churchill had reason to believe that at some point of time, there would be very powerful allies indeed.
In the Napoleonic Wars, Britain found allies again and again.
Either Britain finds new allies in 1919, or there would be negotiations.
Was it really a war Britain did not want to get into? And they were just seeking to protect Belgium?
I leave that to the British to answer, but I encourage you to do a little research on Greece in WW1. These two cases are not comparable, but should
be known.
Now let's say that the rules of this thread
https://www.alternatehistory.com/discussion/showthread.php?t=150698
are implemented. With Germany having a very small fleet and significantly more armies to use in war. How long does it take for Germany to win the war?
The small fleet might change a lot as there is a small chance to draw Britain into entering the Triple-Alliance. There had been negotiations prior
to the war and the German "Flottenpolitik" was the biggest obstacle against better Anglo-German relations. Without this issue, Wilhelm II's anglophilia
might also take over completely (he was a grandson of Queen Victoria and in OTL had a hatelove relationship towards Britain).
However, this POD would probably change everything prior to 1914 already. France and Russia might be unwilling to risk a war over Serbia at all! Germany
would not feel encircled and make different diplomatic decisions.
I doubt that the German taxpayer would be willing to pay for an even larger army. Scaling down the expensive fleet might a larger army, but the taxpayer
would need to be convinced. There was serious political opposition towards fleetbuilding as well, and such an army-expansion might run into different
political interests.
If there would still be war and Britain neutral, you wouldn't even need a larger German army. You also wouldn't need to march into Paris to change
everything. Just figure the CP without the blockade. With full access to the international markets.
And finally:
"And without British soldiers, is it not possible that the Germans could win the race to the sea, and curl the French line?"
Now that is an interesting idea. France might be forced to opt for a shorter front anyways in order to man it. I expect the frontline to freeze
along the river Somme, all the way to the coast.
The race to the sea might be different, however. Capturing/securing the Channel ports might be less crucial in case of a British neutrality. On the other
hand, it might ensure complete German control of Belgium. With Britain neutral, might the possibility to continue the war without fighting on Belgium soil
open up a possibility to negotiate with the Belgian government before Germany's war aims concerning Belgium go over the top?
@bobbis14
Where do you expect the fronlines of the Western front to be in case of a France armistice? A map would be welcome.
"in that scenario the Russian front would decide the war"
Good for the Germans. You know they won the war against Russia?