Originally designed to be a Punk/Metal hybrid, the Thrash band Onslaught was conceived in Bristol, England in 1983 by Nige Rockett (guitar) and Steve Grice (drums). With the addition of Paul Mahoney (vocals) and Jason Stallord, they recorded Power From Hell on the indie 'Cor' label in 1985. Their next release, The Force (1986), on 'Under One Flag' (a subsidiary of 'Music For Nations') saw them expand their membership with Sy Keeler taking up the vocals and Mahoney taking up bass, while Stallord switched to rhythm guitar. The album boasted a strong Anthrax, Metallica and Slayer influence but lacked from little original input. Mahoney would end off leaving soon after to be replaced by James Hinder on bass.
In Search Of Sanity (1989) was their desperate attempt at making it. It was released by 'London Records', but not before Keeler and Stallord were replaced by Steve Grimmett (ex-Grim Reaper) and Rob Trottman respectively. The album's production was halted during the membership change to be re-recorded in the new signer's vocals. When it finally surfaced in 1989, producer Stephan Galfas had watered down their aggressive sound in an effort to make it more commercially successful. After all was said and done, even their cover of AC/DC's Let There Be Rock proved less powerful than desired, even when released as a single (it had previously been released in their original aggressive style); another single, Shellshock, also failed to beef up their popularity with their hardcore fan base. The album lacked much of their hard-line Thrash in favor of a more mainstream sound. It gave them a U.K. 46 but over-all it proved to be a poor idea that failed. Grimmett quit in 1990. Tony O'Hara would replace him, but the label dropped the band. They went their separate ways thereafter.