Trans-Siberian Railway, Vladivostok, Russia. In the wake of the Bolshevik Revolution, the port of Vladivostok in far eastern Russia was of great military importance for the Far Eastern Republic, the Provisional Priamurye Government, and the Allied intervention. The Allied (or 'Siberian') Intervention of 19181922 was the dispatch of troops of the Entente powers to the Russian Maritime Provinces as part of a larger effort by the western powers (and Japan) to support White Russian forces against