The band was founded in 1998 under the name As We Once Were by singer Ben Cook, guitarist Matt Delong, bass player Christian Wylde and drummer Alan "Yeti" Riches.

As As We Once Were, they released two demos, both in 1998, and contributed an exclusive song to Redstar Records' 1999 Various Artists compilation The Sound and the Fury.

Later that year, Boston-based Bridge 9 Records re-released the 7" on CD with different artwork and the demo tape as bonus tracks.

In the fall of 2002, No Warning released what some fans consider to be the band's best work and a monumental album of that era of hardcore, Ill Blood.

After a lot of time spent on tour and different directions the band wanted to take, No Warning broke up in late 2005.

The seven-inch will include new song called "Resurrection of the Wolf" on the A-side and a cover of Violent Minds' "Bloodsucker" on the B-side.

August 2015 saw another reunion show at Gatineau, Canada's Heart Fest where they headlined the Saturday of the three-day hardcore festival, a performance which was received very well.

[9][10] Following that performance, the band debuted the single "Friends in High Places," which would be released as a 7" flexi-disc via Lockin' Out Records and subsequently played their first hometown show since reuniting on April 2 at The Velvet Underground in Toronto.

On August 24, 2017, the band announced a new album, Torture Culture, would be released on October 13 via Bad Actors, Inc. and Last Gang.