Map Of Korea Before Korean War

Most of us picture Korea as two countries, split cleanly down the middle. That picture is younger than it feels. Before June 1950, the peninsula appeared on almost every world map as a single, undivided landmass — one country, one border with China to the north, one coastline wrapping around to the Yellow Sea and the Sea of Japan. The maps printed in those years tell the story of a place that had only just escaped 35 years of Japanese colonial rule, and was about to be carved apart along a line that no Korean had drawn.

From 1910 until 1945, Japan governed the peninsula as a single administrative unit called Chōsen. Colonial-era cartographers mapped 13 provinces, running from North and South Hamgyeong in the far north-east, through Pyeongan, Hwanghae, Gangwon and Gyeonggi, down to the Jeolla and Gyeongsang provinces in the south. Towns were shown by their Japanese names, and the railway network — the Gyeongui line running north to Sinuiju, the Gyeongbu line running south to Busan — gave the map a spine that connected the whole peninsula rather than dividing it. There was no border at the 38th parallel, because there was nothing there to mark.

That changed within weeks of Japan's surrender in August 1945. With Soviet troops already pushing into the north, two American officers, Dean Rusk and Charles Bonesteel, were given half an hour to propose a line that would separate the zones of occupation. They chose the 38th parallel because it divided the country roughly in half and left Seoul in the southern zone. It was never intended as a permanent frontier, but it was printed onto maps almost immediately, and by 1948 two separate governments — one in Seoul, one in Pyongyang — were claiming to speak for the entire peninsula.

Reading the Pre-War Map of a Single Korea

Look at a map of Korea dated 1949 and you see a country that is still legible as one place. The provinces flow across the new dividing line without pausing for it — Gangwon and Hwanghae are each sliced in two on paper, yet their road and rail connections still run north to south. Seoul sits close to the line, an ancient capital of more than 500 years and a natural centre of gravity for the whole peninsula. Pyongyang, further north on the Taedong River, was by then the seat of a rival government but remained, on the map, simply one of Korea's major cities. Cartographers of the period were documenting a landscape of steep eastern mountains, broad western plains and a coastline of more than 8,000 kilometres, all of it administered, on paper at least, as Korean territory.

What makes these maps so striking now is how ordinary they look. A student studying the region in early 1950 would have learned one country, one language and one people, with a temporary military line drawn across it. That line hardened within months. When fighting broke out on 25 June 1950, maps were redrawn almost overnight into the two-colour image we recognise today — and the older, undivided version became an artefact of a very short window in history.