Siberian Intervention powers, since it allowed Germany to shift troops and war material from its eastern front to the west. Also, 50,000 man Czechoslovak Legion, fighting on the side of the Allied Powers, was now behind enemy lines, and was attempting to fight its way out through the east to Vladivostok along the Bolshevik-held Trans-Siberian Railway. Faced with these concerns, the United Kingdom and France decided to intervene in the Russian Civil War against the Bolsheviks. They had three objectives: The British and French asked the United States to furnish troops for both the North Russia Campaign and the Siberian Campaign. In
Trans-Siberian Orchestra feature "The Christmas Attic", the only rock opera from the "Christmas Trilogy" never performed live up to that point. On July 30, 2015, Trans-Siberian Orchestra and a reunited Savatage headlined the 26th edition of Wacken Open Air Festival in Germany, which is the largest metal festival in the world. The 2015 festival lasted three days and featured over a hundred bands. This event marked both TSO's first outdoor festival appearance and first Savatage show in 13 years. A massive set was designed so that the two main festival stages would be identical, although this aspect of the show was not