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
Trans-Siberian Railway USA and Russia's Pacific ports unmolested. This contrasted with Germany and Britain's behaviour; their navies would destroy or capture neutrals' ships sailing to their respective adversaries. As a result, the Pacific Route – involving crossing the northern Pacific Ocean and the Trans-Siberian Railway – became the safest connection between the USA and the USSR. Accordingly, it accounted for as much freight as the two other routes (North Atlantic–Arctic and Iranian) combined, though cargoes were limited to raw materials and non-military goods (locomotives, clothing, foodstuffs etc.). From 1941–42 the railway also played an important role in relocating Soviet industries from European