France possible but unlikely; Britain very unlikely, very but remotely possible; the USA virtually impossible.
Depends on how bad the Great Depression gets. France has a shot, buts it's a very low probability event, with the UK even lower.
The US is a wildcard. An out-and-out Communist revolution along the lines of Russia? Not gonna happen. Socialism getting a toe-hold and becoming a viable third/local party? Now we're talking.
I figured that the USA would be rather impossible. What would be the outcome of a French Communist State? I ask for possible TL/story I'm thinking about
They would copy the Soviet Union a great deal obviously as they were first, so see the French empire become a federation of "republics" and probably a swing to the soviets side so there's going to a great deal of tension between France and its former allies. As to the state its self it would fail but I doubt would fail as badly as the soviets or Maoist the French were already industrialized so no plans that end with millions dead for the sake of more industry.
They would copy the Soviet Union a great deal obviously as they were first, so see the French empire become a federation of "republics" and probably a swing to the soviets side so there's going to a great deal of tension between France and its former allies. As to the state its self it would fail but I doubt would fail as badly as the soviets or Maoist the French were already industrialized so no plans that end with millions dead for the sake of more industry.
If France did go Red, there's no way that the Empire would follow. Either the "White" (for lack of a better word) government moves to Algeria and operates the empire from quasi-exile, or the other great powers (especially the UK) swoop in and gobble the bits up/set up puppet regimes.
As for butterflies, you can bet your bottom dollar that a Red France, on top of a Red Russia, means that Germany gets the official go-ahead to wipe its ass with the Treaty of Versailles. You'd almost certainly see some kind of military-but-not-neccesarily-right-wing government take over in Germany, who reaches an understanding with the UK (and probably Poland).
Oh I doubt the rest of the empire would follow them but I'm guessing some of it would there actually alegeria is the one place I think would follow definitely as it's very close and there's a lot of French military assets in place already. Also your supposing it comes to power via a viloent revolt there was a chance the French could have elected the communist in not a great chance mind you but a chance in that case the empire follows. Or there could have bee a coup in that cause it could follow depending on the success of the coup. Your observations on Germany are spot on I think I wonder if this would weak or strengthen the nazi party on one hand no more crippling treaty on the other hand encirclinment by communist.
Would they have tried to spread it around in other places, like Spain during their Civil War?
The Nazi's would probably get butterflied away, they had a very specific path to power that could have blown up in their face (sometimes literally) a dozen times over. If they didn't get derailed, they'd probably get folded into whatever center-right party emerged (probably with covert funding from the UK).
I'm agree that Germany would definitely get the okay from GB to begin arming themselves. I myself think they would try to get Communist gov't. What does Italy do and what camp do they fall into?
Communism probably the biennio rosso weren't that far behind them at that point I know that even during there communist insurgents operating in Italy and afterwards a communist government was almost voted into power. If the communist had a benefactor on the border Italy going to go red at some point or another. It could end up in civil war communist vs facist that would be ugly.