History of North Korea - The Korean War

The Korean War

The consolidation of Syngman Rhee's government in the South with American military support and the suppression of the October 1948 insurrection ended hopes that the country could be reunified by way of Stalinist revolution in the South, and from early 1949 Kim sought Soviet and Chinese support for a military campaign to reunify the country by force. The withdrawal of most U.S. forces from South Korea in June 1949 left the southern government defended only by a weak and inexperienced South Korean army. The southern regime also had to deal with a citizenry of uncertain loyalty. The North Korean army, by contrast, had been the beneficiary of the Soviet Union's outdated Soviet WWII-era equipment, and had a core of hardened veterans who had fought as anti-Japanese guerrillas or with the Chinese Communists.

Initially, the Soviet Union's Joseph Stalin rejected Kim's requests for permission to invade the South, but in late 1949 the Communist victory in China and the development of Soviet nuclear weapons made him re-consider Kim's proposal. In January 1950, after China's Mao Zedong indicated that China would send troops and other support to Kim, Stalin approved an invasion. The Soviets provided limited support in the form of advisors who helped the North Koreans as they planned the operation, and Soviet military instructors to train some of the Korean units. However, from the very beginning Stalin made it clear that the Soviet Union would avoid a direct confrontation with the U.S. over Korea and would not commit ground forces even in case of some major military crisis. The stage was set for a civil war between two rival regimes on the Korean peninsula.

For over a year before North Korean forces tried to attack the southern government on June 25, 1950, the two sides had been engaged in a series of bloody clashes along the 38th parallel, especially in the Ongjin area on the west coast. On June 25, 1950, the northern forces escalated the battles into a full-fledged offensive and crossed the parallel in large numbers. Due to a combination of surprise, superior military forces, and a poorly armed South Korean army, the Northern forces quickly captured Seoul and Syngman Rhee and his government was forced to flee further south. By mid July, North Korean troops overwhelmed the South Korean and allied American units defending South Korea and forced them back to a defensive perimeter in south-east South Korean known as the Pusan Perimeter. However, the North Koreans failed to unify the peninsula when foreign powers entered the civil war. North Korean forces were soon defeated by September and driven northwards by United Nations forces led by the U.S. By October, the U.N. forces had retaken Seoul and captured Pyongyang, and it became Kim's turn to flee. But in late November, Chinese forces entered the war and pushed the U.N. forces back, retaking Pyongyang in December and Seoul in January 1951. In March, U.N. forces retook Seoul, and the war essentially became a bloody stalemate for the next two years. The front was stabilized in 1953 along what eventually became the current Armistice Line. After long negotiations, the two sides agreed on a border truce.