Heavy metal music
Critics disagree over who can be thought of as the first heavy metal band. Most credit either Led Zeppelin or Black Sabbath, with American commentators tending to favour Led Zeppelin and British commentators tending to favour Black Sabbath, though many give equal credit to both. A few commentators—mainly American—argue for other groups including Iron Butterfly, Steppenwolf or Blue Cheer. Deep Purple, the third band in what is sometimes considered the "unholy trinity" of heavy metal (Black Sabbath, Led Zeppelin, and Deep Purple), despite being slightly older than Black Sabbath and Led Zeppelin, fluctuated between many rock styles until late 1969 when they took a heavy metal direction.
Heavy metal music
The first generation of metal bands was ceding the limelight. Deep Purple had broken up soon after Blackmore's departure in 1975, and Led Zeppelin broke up following drummer John Bonham's death in 1980. Black Sabbath plagued with infighting and substance abuse, while facing fierce competition with their opening band, the Los Angeles band Van Halen. Eddie Van Halen established himself as one of the leading metal guitarists of the era. His solo on "Eruption", from the band's self-titled 1978 album, is considered a milestone. Eddie Van Halen's sound even crossed over into pop music when his guitar solo was featured on the track "Beat It" by Michael Jackson (a U.S. number 1 in February 1983).