Ulchi-Freedom Guardian (UFG) is the new name (as of 2008) of the military exercise previously known as Ulchi-Focus Lens, a combined military exercise between South Korea and the United States. The exercise is the world's largest computerized command and control implementation which mainly focuses on defending South Korea from a North Korean attack. The exercise was initiated in 1976 and is conducted annually during August or September. The word 'Ulchi' comes from the name of a famous Korean general called Eulji Mundeok, who was the Commander-In-Chief of the army of Goguryeo.