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The theatre of war

The Korean Peninsula is 856 kilometres long, bordered by the Sea of Japan in the east, the Korea Strait in the south and the Yellow Sea to the west. Mainland Japan lies 160 kilometres across the Korea Strait...

Painting of Kapyong landscape

Kapyong landscape, Oil on hardboard, 1953 by Ivor Hele. The battlefield of Kapyong is typical of the terrain over which much of the Korean War was fought. [AWM ART40313]

Photo of Korean orphans walking through rice fields

Typical Korean countryside with rugged mountains and narrow flat crop-filled valleys in between. [AWM P04641.130]

The northern border with China runs along the Yalu River. In the north east there is an 18-kilometre border with Russia (then the Soviet Union) through which Soviet supplies came to North Korea. Korea has 9200 kilometres of mostly inhospitable coastline and more than 3500 offshore islands. The waist of the peninsula, where most of the war was fought, is generally 350 kilometres in width and at its narrowest 200 kilometres.

The Taebaek Range, with heights up to 1708 metres, runs down the east side of the peninsula and smaller ranges head west from it, making a barrier to the movement of armies along the central spine of the country. In 1950, road and rail lines were few and tended to run north-south along both coasts with few east-west connections. On the east coast the close proximity of mountains to the sea broke up the coastal plane. The mountains slope down more gently to the west coast, where there are wide plains and broad shallow tidal estuaries. Most of the major rivers flow from north-east to south-west, forming a further series of obstacles to north-south movement, especially within the mountains where road and rail bridges were rare.

Seoul, the South Korean capital, was an important political objective for both sides. It was also of great practical importance as the focal point of all west coast communications. Ports were few. Fortunately for the UN, Korea’s greatest port Pusan (Busan) was in the south-east corner of the country, close to Japan, the UN’s base for supply. Pusan was never taken by the communists.

There are extreme variations in climate in Korea. In summer, it is rainy, hot and humid. Winter brings bitter winds to Korea from Siberia and Mongolia. The winter temperature in the mountains can be extremely cold - minus 17 celsius is normal and snow covers the mountains throughout winter.

Photograph of 3RAR gathered around a fire in mid-winter 1952

On an exposed hilltop position in mid-winter 1952, members of the 3rd Battalion, The Royal Australian Regiment (3RAR), gather in little groups around fires to keep themselves warm. As additional protection against the winter cold, most of the soldiers are wearing padded windproof jackets and pile caps. Photographer Ian Robertson. [AWM P02201.136]

As the North Korean and Chinese armies were lightly equipped and less motorised they found it easier to operate in the mountains than the UN forces who depended upon road and rail for movement and supply. Thus in the first year of the war – the war of movement – the UN tended to launch its attacks up the coasts where, as the UN had complete control of the sea lanes, it could also use sea transport and supply. This left a gap in the intervening mountains which the communists exploited in their first counteroffensive from October 1950. In the second static phase of the war the communists continued to launch offensives in the mountains where, owing to a poor road network often closed by snow in winter, UN forces were not well able to reinforce their troops once the axis of communist attack was revealed.

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