Trans-Siberian Railway men and ammunition coming from west to east would have to wait in the sidings, whilst troops and injured personnel in a troop train travelling from east to west went along the line. Thus the Japanese were quickly able to advance whilst the Russians were awaiting necessary troops and supplies. After the Russian Revolution of 1917, the railway served as the vital line of communication for the Czechoslovak Legion and the allied armies that landed troops at Vladivostok during the Siberian Intervention of the Russian Civil War. These forces supported the White Russian government of Admiral Alexander Kolchak, based in
Chinese Eastern Railway the west as Port Arthur, and the Russo-Japanese War (1904–1905) was fought largely over who would possess this region and its excellent harbor, as well as whether it would remain open to traders of all nations (Open Door Policy). The Chinese Eastern Railway was essentially completed in 1902, a few years earlier than the stretch around Lake Baikal. Until the Circumbaikal portion was completed (1904–1905; double-tracked, 1914), goods carried on the Trans-Siberian Railway had to be trans-shipped by ferry almost a hundred kilometers across the lake (from Port Baikal to Mysovaya). The Chinese Eastern Railway became important in international relations.