When did heavy metal music begin?
Heavy metal developed in the late 60s and early 70s largely in the United Kingdom.  Part of the British Invasion.
Did Led Zepplin lead the way?
most famous pioneers, Led Zeppelin, Black Sabbath and Deep Purple were founded. Though they came to attract wide audiences, they were often derided by critics. Following the blueprint laid down by Led Zeppelin and Black Sabbath, several American bands modified heavy metal into more accessible forms during the 1970s: the raw, sleazy sound and outrageous stage shows of Alice Cooper and Kiss; the blues-rooted rock of Aerosmith; and the flashy guitar leads and wild party rock of Van Halen. During the mid-1970s, Judas Priest helped spur
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Rock Hard rock and Heavy metal.
The hard rock and heavy metal genres were developed from blues-rock in the late 1960s and early 1970s, largely in England and the United States. Played louder and with more intensity, it often emphasised the electric guitar, both as a rhythm instrument using simple repetitive riffs and as a solo lead instrument, and was more likely to be used with distortion and other effects. Key acts included British Invasion bands like The Who and The Kinks, as well as psychedelic