Hyunmoo (Hangul: 현무, literally means "Guardian of the Northern Sky") was a series of missiles developed by South Korea. The Hyunmoo is the only ballistic missile developed by South Korea that was actually deployed. This missile improved the first stage propelling device that was a problem in the Paekgom. The first test-launch of the Hyunmoo was successful in 1982; following domestic twists and turns due to internal political situation of South Korea until the second test-launch in September 1985 flight test by the Defense Systems Test Center (DSTC).