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
Far Eastern Railway is hoping to implement the idea of constructing the Trans-Korean Main Line and then connect it with the Trans-Siberian Railway one day. Indeed, further development of the Khasan—Tumangang border crossing may provide additional 10 million tonnes of cargo per year, according to some forecasts, let alone a potential two-way traffic of up to 200,000 cargo containers per year from the port of Busan. The Grodekovo—Suifenhe City border crossing in Primorsky Krai also plays an important role in the Russo-Chinese economic relations. The freight traffic between the two countries increases by one million tonnes per year. Strong ties with the ports