What POD is needed to get a White victory in the Russian civil war and as Churchill put it, "strangle the infant Bolshevism in the cradle." Personally I think the allies would be much more likely to be fully committed to supporting the Whites if WW1 had been less bloody. That would mean there would be less war weariness among the Allied nations. Avoiding Gallipoli and the Somme might help in this regard.