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.
Hanbit Unit
Following Sudan's independence in 1956, the northern and southern regions fought two civil wars, the First Sudanese Civil War (1955-1972) and the Second Sudanese Civil War (1983-2005). In order to prevent further damage, the southern regions was separated from Sudan and the South Sudan became an independent nation in July 2011. The United Nations created the United Nations Mission in South Sudan (UNMISS) to support the South Sudanese peace process in 2011. In 2011, UN Secretary-General Ban Ki-moon asked the government of the Republic of Korea to deploy a unit of the South Korean Army as part of the United Nation's peacekeeping mission in South Sudan. South Korean passed an agreement to form and dispatch a dedicated peacekeeping unit on 27 September 2012, resulting in the Hanbit Unit being created in January 2013.