In 1953, at the end of the Korean War, the NNSC appointed Switzerland to monitor the demarcation line between North and South Korea. This was the Swiss Armed Forces' first mission abroad. In 1974, Switzerland established diplomatic relations with North Korea.
Between 1997 and 1999, Switzerland hosted quadripartite talks between the two Koreas, China and the United States in Geneva. It also hosted three other important meetings between the United States and North Korea on the normalisation of their bilateral relations and the conditions for a resumption of the six-party talks on the denuclearisation of North Korea.
North Korea, Historical Dictionary of Switzerland (de, fr, it)