In October, the Soviet Union declared Kim Il-sung’s government as sovereign over both parts. The UN declared Rhee’s government as “a lawful government having effective control and jurisdiction over that part of Korea where the UN Temporary Commission on Korea was able to observe and consult” and the Government “based on elections which was observed by the Temporary Commission” in addition to a statement that “this is the only such government in Korea.” Both leaders began an authoritarian repression of their political opponents inside their region, seeking for a unification of Korea under their control. While South Korea’s request for military support was denied by the United States, North Korea’s military was heavily reinforced by the Soviet Union.
Korean War:
On June 25, 1950, North Korea invaded South Korea, sparking the Korean War, the Cold War’s first major conflict, which continued until 1953. At the time, the Soviet Union had boycotted the United Nations (UN), thus forfeiting their veto rights. This allowed the UN to intervene in a civil war when it became apparent that the superior North Korean forces would unify the entire country. The Soviet Union and China backed North Korea, with the later participation of millions of Chinese troops. After an ebb and flow that saw both sides almost pushed to the brink of extinction, and massive losses among Korean civilians in both the north and the south, the war eventually reached a stalemate. During the war, Rhee’s party promoted the One-People Principle (based on the German ideology of the Herrenvolk) an effort to build an obedient citizenry through ethnic homogeneity and authoritarian appeals to nationalism.
The 1953 armistice, never signed by South Korea, split the peninsula along the demilitarized zone near the original demarcation line. No peace treaty was ever signed, resulting in the two countries remaining technically at war. Approximately 3 million people died in the Korean War, with a higher proportional civilian death toll than World War II or the Vietnam War, making it perhaps the deadliest conflict of the Cold War-era. In addition, virtually all of Korea’s major cities were destroyed by the war.
Post-Korean War (1960–1990):
In 1960, a student uprising (the “April 19 Revolution“) led to the resignation of the autocratic then-President Syngman Rhee. This was followed by 13 months of political instability as South Korea was led by a weak and ineffectual government. This instability was broken by the May 16, 1961, coup led by General Park Chung-hee. As president, Park oversaw a period of rapid export-led economic growth enforced by political repression.
Park was heavily criticized as a ruthless military dictator, who in 1972 extended his rule by creating a new constitution, which gave the president sweeping (almost dictatorial) powers and permitted him to run for an unlimited number of six-year terms. The Korean economy developed significantly during Park’s tenure. The government developed the nationwide expressway system, the Seoul subway system, and laid the foundation for economic development during his 17-year tenure, which ended with his assassination in 1979.