From the book, Senseless Secrets, by Lt. Col.(ret) Michael Lee Lanning. Written in 1996. Word for word from the book:

“At the end of WW1 there were two concerns over Russia. One was that there were tons of military supplies that had been sent by the Allies to Russia that were sitting on the docks at Vladivostok. The fear was the Russians would sell them to the Germans. The second was that in Archangel thousands of Czechs who were Russian prisoners wanted to return home and form their own country.”

“Against the advice of his Cabinet, President Wilson, on the basis of information supplied by the British, made the decision to send American troops to assist the British and French in Siberia and Northern Russia.

“On site intelligence by the American forces in Siberia and Northern Russia would not be sufficient to assist commanders to accomplish their mission.”

“During more than eighteen months of operations, the Americans in Siberia and Northern Russia fought Russian factions, bitter cold, and unmitigated confusion in a futile attempt to offer some stability to the post-revolutionary country.”

“…U.S. accomplishments totaled zero with the exception of leaving the Bolsheviks with a long term dislike for the interfering Americans.”

“ An after action report written by the American Expeditionary Force staff noted: “The entire affair was manifestly conceived in an atmosphere of inaccurate intelligence information”