Gyeongui Line (1904–1945)
Following Japan's defeat in the Pacific War and the subsequent partition of Korea, the Gyeongui Line was divided at the 38th parallel between North and South Korea. On 25 August 1945, the Soviet Army began operating trains on the line north of Sariwon, whilst trains in the south terminated at Gaeseong. In 1946, the railways in both North and South were nationalised, creating the Korean National Railroad in the South and the Korean State Railway in the North. After the Korean War, the Gyeongui Line was split into three sections. In the South, the Seoul–Jangdan section became the KNR's Gyeongui Line, retaining the same name; in the North, the Bongdong–Pyeongyang section became the P'yŏngbu Line, whilst the Pyeongyang–Sinuiju section became the P'yŏngŭi Line.
North Korea–South Korea relations
South Korea and North Korea competed as "Korea" in some events at the 2018 Asian Games. The co-operation extended to the film industry, with South Korea giving their approval to screen North Korean movies at the country's local festival while inviting several moviemakers from the latter.
In August 2018 reunions of families divided since the Korean War took place at Mount Kumgang in North Korea. In September, at a summit with Moon in Pyongyang, Kim agreed to dismantle North Korea's nuclear weapons facilities if the United States took reciprocal action. In Pyongyang, an agreement titled the "Pyongyang Joint Declaration of September 2018" was signed by both Korean leaders The agreement calls for the removal of landmines, guard posts, weapons, and personnel in the JSA from both sides of the North-South Korean border. They also agreed that they would establish buffer zones on their borders to prevent clashes. Moon became the first South Korean leader to give a speech to the North Korean public when he addressed 150,000 spectators at the Arirang Festival on 19 September. Also during the September 2018 summit, military leaders from both countries signed a Agreement on Reconciliation, Non-Aggression, Exchanges and Cooperation" (aka "the Basic Agreement") to help ensure less military tension between both countries and greater arms control