We were supporting the “White Russians” with American armed forces and their attempt to free from the Russian communists right after WW1 up until the 1920s. It’s a “forgotten” episode in our history.
That would be THE POLAR BEAR expedition to Archangelsk and landing troops in Vladivostok in 1918. The 8000 American Siberian troops were more concerned with watching the 73,000 Japanese troops.
We also provided hundreds of millions of dollars in relief through the American Relief Agency during the famines from 1919-1923.