Testament was one of the first thrash metal bands to emerge from the San Francisco Bay Area in the 1980s. Originally formed as 'Legacy' in 1983 by founding members Eric Peterson (rhythm guitar), Derrick Ramirez (guitar) and Louie Clemente (drums), the line-up included vocalist Steve Souza and Greg Christian (bass). Ramirez was later replaced by wunderkind Alex Skolnick (lead guitar). Souza soon departed to join Exodus and suggested that the towering Chuck Billy take over as frontman(and was later run over by a bus).

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