I'm not particularly knowledgable on WWI and the time period immediately after, so this may be super ASB.The basic idea is simply that things go far better for the Revolutions of 1917-1920 than they did OTL.The White Movement is weaker in this TL, largely due to many of its would-be generals having emigrated or having been shot by the Bolsheviks.The ability of the Allied Powers to lend men and resources to anti-Communist fighters in Russia is severely hampered by the outbreaks of Socialist revolutions all across the continent, including in the Allied nations themselves. Without the threats to contend with that it faced in OTL, the USSR is free to focus on external affairs.The nascent Red Army barrels through Ruthenia and links up with Bela Kun's Hungarian Soviet Republic, saving it from collapse at the hands of the Romanian army. At the same time, another wing of Bolshevik forces advances into East Prussia and Poland. Warsaw, encircled, holds out for the time being, but with no reinforcements nor supplies expected or possible, the outlook is dire.Polish forces in the south, meanwhile, are occupied with containing the Slovak Soviet Republic, which effectively serves as a wing of the Hungarian Soviet, and by extension, the Bolsheviks in Moscow.The Bavarian Soviet Republic is saved as the government in Berlin (or was it already in Weimar at this point?) is overthrown by a successful Spartacist uprising, which brings the city under the control of the Berlin Soviet. The Communist in Munich link up with those in Berlin, and a greater German Soviet Republic is proclaimed.The rest of Germany falls under the control of a confused mess consisting of monarchists, moderate republicans, liberals, and all who do not rally to the Communist banner.Inspired by the example of the northern Germans, Vienna is re-organized under a Soviet government.Bohemia occupies southern Silesia, and the German Soviet Republic pushes east into Poland, determined to establish contact with the Russians before they collapse under an French-American onslaught.Italy is rocked by socialist revolution, as workers' councils spontaneously form across the north of the country. An Italian Soviet Republic is proclaimed, as Bourgeoisie elements flee south to consolidate loyal forces.Finally, Great Britain herself undergoes a socialist revolution. The Soviet Republic of Great Britain spreads its influence from Cornwall to Scotland, while the British Government and the King flee to Ulster.Meanwhile, France, terrified as Communism seems poised to devour the continent, surges forward into Germany, determined to halt the red advance in its tracks. Joining Gallic forces is the American Expeditionary Army, still in Europe following the conclusion of the Great War.At the same time, US and French troops alike march into Italy, determined to roll back the communists there, too.Britain's Red Navy funnels supplies to an uprising in Marseille, and attempts a landing in Quiberon and the Vendée. She also seizes French Syria, and establishes a beachhead in Algeria, as well as occupying Sicily, Sardinia, and Corsica, rushing to lend aid to any and all socialist movements sprouting up across the continent.