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.
History of South Korea
Korea was administratively partitioned in 1945, at the end of World War II. As Korea was under Japanese rule during World War II, Korea was officially a belligerent against the Allies by virtue of being Japanese territory. The unconditional surrender of Japan led to the division of Korea into two occupation zones (similar to the four zones in Germany), with the United States administering the southern half of the peninsula and the Soviet Union administering the area north of the 38th parallel. This division was meant to be temporary (as was in Germany) and was first intended to return a unified Korea back to its people after the United States, United Kingdom, Soviet Union, and Republic of China could arrange a single government for the peninsula.