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My understanding is that the United States sent two separate ground forces to take part in the Russian Civil War

Only the Polar Bear Expedition would see combat, fighting the Red Army. The Red Army would of course later emerge victorious.

Although the ideology of the Bolsheviks was undoubtedly different than that of most American politicians, there was not yet a clear track record of the atrocities committed by the Soviet Union. Stalin had not yet conducted his purges for example. I find it unlikely that the US would have intervened solely on the basis of ideology.

What did the United States' hope to achieve by intervening in the Russian Civil War? Were they simply trying to gain favor with the other powers in Europe? Or were they trying to protect American interests in Russia?