Switching around the alliances for the Second Great War in TL-191.
Socialist Party dominance in the USA during the Interwar period results in an alliance with the RSDLP-led Russia, which is forced to compromise and form a coalition government during the Second Congress of Soviets, forming the RSFSR (USSR minus Ukraine and the Baltic States, which are under German occupation, plus the Alaskan Autonomous SSR). Martov and Lenin compromise by having a power-sharing agreement between Chairwoman Alexandra Kollontai (representing the Mensheviks) and Premier Lev Kamenev (representing the Bolsheviks) in exchange for diplomatic recognition and weapons supplies from the US.
Although the US successfully pressures the Kollontai-Kamenev government to moderate and allow most Romanov and White Russian leaders to escape into exile, this new alliance upsets the Central Powers so much that Germany dissolves its military ties with the US. Germany reconciles with Britain and allows Japan to purchase its Pacific colonies, then forms the Anti-Communist Pact with Britain, Japan, Austria-Hungary, the Ottomans, and the Confederate States. France, still bitter after getting pulverised twice by the Germans, undergoes a socialist-revanchist takeover and allies with Russia and USA. The Kuomintang adds democratic socialism to its party constitution during the Interwar as well and formally joins the New Entente.
The Second Great War will now be fought between the socialist New Quadruple Entente (USA, RSFSR, Republic of China, Third French Republic) and the monarchist Quintuple Alliance (Germany, UK, A-H, Turkey, Japan and CSA). Although the Entente successfully destabilize the Ottoman Empire and CSA by supporting left-wing rebellions during the SGW, the war is much less conclusive after Germany develops the superbomb first and detonates it somewhere over the US-occupied Carribean to force peace negotiations. This leads to the TL-191 version of the Cold War...