1) Possessed started with Mike Torrao (guitar) and Mike Sus (drums) as a garage band in San Francisco's Bay Area. They formed in 1983, and were basically a garage band, with several lineup changes. Late in 1983, though, their singer Barry Fisk committed suicide, and when they managed to recruit singer/bassist Jeff Becerra they formed the band Possessed.
Jeff was fronting a local commercial-style metal band called Blizzard before he quit to join Possessed. (Also involved in this band were future Possessed guitarist Larry Lalonde and the band's future manager, Debbie Abono.) Jeff and the two Mikes, along with second guitarist Brian Montana, started perfecting their own brand of metal which was the precursor to modern death metal - very fast, savage riffs, warp-speed drums, mile-a-second solos, and the raspy growl of the vocals later perfected by Chuck Schuldiner of Death. (In fact, Chuck's vocals on "Scream Bloody Gore" sound almost exactly like Jeff Becerra's vocals on "Seven Churches," an album Schuldiner cites as a significant influence.)
Possessed took San Francisco's metal scene by storm, playing out with fellow Bay Area thrashers Exodus (it happened that the two Mikes were pretty good friends with Exodus' H-team, Rick Hunolt and Gary Holt) and other bands (many now long gone).