The Siberian Intervention came quickly after the Russian October Revolution of 1917. The new Bolshevik government signed a separate peace treaty with Germany. That was a serious problem for the Entente powers. The treaty ended fighting for the Germans facing Russia. Germany could then move soldiers from east to west; against Europe. The peace agreement also allowed Germany to get many supplies from Murmansk, Arkhangelsk and Vladivostok. In addition, a 50,000 man Czech Legion had been fighting on the side of the Allies. They became trapped. The Czechs were trying to fight their way out to the east to Vladivostok along the Trans-Siberian Railway. However, the Bolsheviks controlled that railway.