Country of origin: United Kingdom Location: Bristol, England Status: Active Formed in: 1982 Genre: Hardcore Punk (early); Thrash Metal (later) Themes: Death, Violence, Satan, Metal, Insanity, Society Current label: AFM Records Years active: 1982-1991, 2004-present Started as a hardcore punk band and released several demos in this style before shifting to their more well-known thrash metal approach. Not to be confused with another punk band called Onslaught from the UK who released a 7" called First Strike on Control Records in 1984. The band's line-up shuffled considerably following Power from Hell. Bassist Jase Stallard became the second guitarist and Paul "Mo" Mahoney took over playing bass to allow Sy Keeler to take his place as vocalist. After signing to major label imprint London Records, Onslaught were coerced into replacing Sy Keeler with Steve Grimmett. After In Search of Sanity was released, the band was dropped. Tony O'Hora came in as vocalist for a brief period before the band parted ways in 1991. Reformed in 2004. Nige Rockett has been performing rhythm guitar only since the reformation despite playing all lead guitar parts in the band's early days.