Random Area XIV: The Realm of Infantry Generals

Alternate history where Operation Overlord fails (but still weakens the German troops)  And the Soviets invade all the way to Paris. The Americans are forced by their people to withdraw from the war, so the Manhattan project is never completed, and instability takes America. 

Due to a much higher loss in soviet life, and them gaining more fertile land in both the East and West, the Famines never happen, so soviet moral and patriotism is high. This leads to communism being praised, and a 1984 like dystopia is able to form behind the Iron curtain. 

Oh yeah, overlord failed because the Germans were able to see through the fake armies, and they had more accurate weather data.

Well it's not really something to participate in. It's more of a story I'm making, and I'll be releasing it chapter by chapter on here. The best thing you could do is let me know whether it's of good quality or not. 

*the

It's more focused on the life inside the curtain rather than the war aspect. 

In my opinion, Overlord failing is extremely implausible. As in Germany defeating the Soviets level of implausibility. The Allies had air and naval superiority, so they would eventually be able to break out of their beach heads. Also, German logistics weren't any better than the Allies; they were frustrated by roads and bridges being destroyed by the French resistance and Allied bombers. With the abysmal state of German intelligence, I don't see how Germany is going to see through the fake armies. I don't see how more accurate weather data is going to help Germany enough. Maybe it makes German officers more afraid of an invasion, so they don't go on leave. But good leadership only does so much in the face of overwhelming material inferiority.

As for the butterflies, the US committed itself to unconditional surrender; there is no way they will exit the war until the complete defeat of the Axis. Also, the Manhattan Project will still be completed; you can delay its development, but I think it's impossible for it to be canceled. The Soviets annexed everything they wanted to in OTL. If the Soviets make it to Paris, it is much more likely that they establish communist regimes in Western Europe, especially since the French Communist Party was pretty strong at this time. Lastly, I don't see how the Iron Curtin being pushed past Western Europe leads to Communism being praised; if anything the Red Scare will be intensified.

Personally, I am more interested in what POD's you will use to justify Overlord failing. General things like seeing through fake armies don't count as POD's to me; rather, they are butterflies. A POD would be some kind of decision that specifically leads towards the Germans having better intelligence. If I were you, I would try a different POD to get a Soviet dominated Europe, something like Kesselring defeating the Salerno landings through a quicker counterattack with his reserves or the Germans trying to take Moscow by transferring Panzers from Army Group North to Center. 

Still, wish you good luck writing it! 

I would approach this with a little outline: (This is just an example of what I would do. You are the author, so you can do whatever you want)

Objective: Soviet dominated Germany

How can this be achieved: Soviets do better against Germany, Allies do worse against Germany

What big butterflies can create this: Germany makes a big gamble that fails in the Eastern Front, Allies underestimate the Germans 

What small butterflies can create this: A failed attack on Moscow, Failed Salerno landings

What POD's can work: Kesselring counterattacks quicker with his reserves, Germany transferring Panzers from Army Group North to Center.

Now that I think about it, I think the POD's I suggested would be enough to get most of Germany communist, but not France and other Western European countries. The Allies would have to be handed a huge idiot ball to make enough mistakes for the Soviets to take France. It's OK, you can always change parts in the outline.