Gyeongwon Line (1911–1945) on 1 April 1944. After the partition of Korea following the end of the Pacific War in 1945, the Gyeongwon Line was split along the 38th parallel between the stations of Hantangang and Choseongni. The railways in both South and North were nationalised, and the newly established Korean National Railroad took over operation of the truncated Gyeongwon Line, from Seoul to Choseongni; in the North, the Korean State Railway merged its section of the Gyeongwon Line, Choseongni−Wonsan, with the Wonsan−Gowon section of the former Hamgyeong Line to create the Gangwon Line. The line was severely damaged during the Korean War.
Soviet Union in the Korean War pilots flying MiG-15 jets participated in battles around the Yalu River Valley on the Chinese-Korean border in the area known as "Mig Alley" and in operations against UN "trainbusting" attacks in Northern Korea, with considerable success. The lack of a shared language between Soviet, Chinese and North Korean pilots frequently led to incidences of friendly fire as other MiG fighters were mistaken for American F-86 Sabre jets and shot down. The MiG-15 was a jet aircraft, supplied in large numbers to Chinese and North Korean forces during the war by the Soviet Union. Owing to their modern design (they were