Korean reunification selected the 38th parallel as a dividing line. Japanese troops to the North of this line were to surrender to the Soviet Union and troops to the South of this line would surrender to the United States. This was not originally intended to result in a long-lasting partition, but Cold War politics resulted in the establishment of two separate governments in the two zones in 1948 and rising tensions prevented cooperation. The desire of many Koreans for a peaceful unification was dashed when the Korean War broke out in 1950. In June 1950, troops from North Korea invaded South Korea.
Thailand in the Korean War Thailand in the Korean War Thailand was one of the 21 countries who responded to the United Nations request to send troops to aid South Korea during the Korean War 1950-53. As well as being one of the first countries to openly express its support for South Korea's cause, whilst also being one of the UN's larger contributors to the war. Thai support was important to battles determining the outcome of the war, including Pork Chop Hill and the Third Battle of Seoul. Thailand was the first country in Asia to send aid to South Korea. Realising that a communist