38度線
Wŏnsan used to be in South Hamgyŏng, but when provincial borders were redrawn in 1946, it joined the northern half of Kangwŏn (which had been split at the 38th parallel north into a zone under Soviet control in the north and one of American control in the south in 1945) and became its capital, as Kangwŏn's traditional capitals Wŏnju (1395–1895) and Ch'unch'ŏn (since 1896) both were south of the 38th parallel and south of the Military Demarcation Line that replaced the 38th parallel as a border in 1953.