Megadeth is an American heavy metal band from Los Angeles, California, formed in 1983. Founded by guitarist/vocalist Dave Mustaine and bassist David Ellefson following Mustaine's departure from Metallica, the band has since released 12 studio albums, three live albums, two EPs, 26 singles, 32 music videos, four compilations and one box set. As a pioneer of the American thrash metal movement, Megadeth rose to international fame in the 1980s and was ranked as one of the "Big Four of Thrash" along with Metallica, Slayer, and Anthrax, who were responsible for creating, developing and popularizing the thrash metal sub-genre.