Trans-Siberian Railway imperial collapse, and before the Red Army took control, the Czechs and Slovaks were able to use their organisation and the resources of the railway to establish a temporary zone of control before eventually continuing onwards towards Vladivostok, from where they emigrated back to Czechoslovakia. During World War II, the Trans-Siberian Railway played an important role in the supply of the powers fighting in Europe. During the first two years of the war the USSR had secretly agreed to a neutrality and non-aggression pact with Germany. While Germany's merchant shipping was interdicted by the Western allies, the Trans-Siberian Railway (along
East Siberian Railway perfected the design of alternating current locomotives, overhead catenary system, means of communication, signaling, centralised traffic control and the automatic block system, all of which would later be introduced on other railways in one way or another. 97% of the traffic along the East Siberian Railway is done by means of electric traction. The East Siberian Railway consists of several sections, one of which is the Circum-Baikal Railway – a monument to industrial architecture of federal importance. It stretches for over from the Baikal railway station to the Kultuka railway station. The uniqueness of this wonder of engineering is that