Want an "alternate history" scenario ? Whe the Finnish Civil War wound down in 1918 the Bolsheviks were still in a very precarious position in St. Petersburg (it took them quite a few years of Russian Civil War to take over the whole country) and the newly blooded Finnish "White" army was rather close by, due to having only recently chased the beaten Finnish "Reds" to the border. Marshal Mannerheim even opened negotiations with the Russian "White" generals on the topic of marching in and getting rid of the "Bolshevik rabble" (an aristocrat, conservative and a former senior officer of the Imperial Russian Army, Mannerheim was no friend of the revolutionaries). The latter, however, for some unfathomable reason were unwilling to unconditionally recognize the already de facto independence of Finland - something Lenin and the Boys, running on total crisis management mode, had been about the first in the world to do.

So Mannerheim called the whole thing off, and Finnish participation in the Russian Civil War was limited to some over-enthusiastic volunteers trying to 'liberate' the Finnish-speaking populaces of a few border areas in the so-called "Tribal Wars". The Red Army duly chased them off right quick once they could spare the troops from dealing with the Whites.

The "what if" scenario should be obvious...