The White armies opposing the new Bolshevik government in Moscow reached their peak in the autumn of 1919, when White armies were within 200 miles of Moscow and within sight of Petrograd.
The Allies supported anti-Bolshevik forces in Russia, but once the Great War ended, the Allies were in a dilemma. Abandon the White movement, or see the conflict through?
Bolshevik Russia and the western Allies tried to maintain cordial relations during 1918, but it didn't last. By the end of the year, Allied troops were in Russia and Allied governments were backing anti-Bolshevik forces.
The three Baltic states manage to become the only Imperial Russian possessions--besides Finland and Poland--to win their independence.