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.
Kwalliso
From its inception, North Korea has maintained a complex relationship with Russia and China. Immediately after the end of the Korean War (1953), North Korea and Kim Il Sung looked to the Soviet Union and China for both economic and military support. Prior to the great split between the Soviet Union and China in the early 1960s, Kim visited both capitals often, but the split created enormous problems for Kim, who struggled to keep on good terms with both of them. To a large extent, he owed his career as well as his country’s well-being to Russia and China, yet he was always wary of their dominant power. But the Sino-Soviet dispute also gave Kim Il Sung ample space to maneuver between the two great powers of communism, each of which was forced to tolerate his independence for fear of pushing him decisively to the opposite camp.