The Russian Civil War spread to the east in May 1918, with a series of revolts along the route of the Trans-Siberian Railway, on the part of the Czechoslovak Legion and officers of the Russian Army. Provisional anti-Bolshevik local governments were formed in many parts of Siberia and other eastern regions during that summer. The Red Army mounted a counter-offensive in the autumn, and in 1919 defeated the White commander Aleksandr Kolchak in Siberia. Smaller-scale conflicts in the region went on until 1923.