Named in tribute to the events of the Kronstadt rebellion the band were formed in 1981 by Steve Pegrum joined by Spencer Blake, Paul Lawson and Andy Fisher (although in 1982 the band were to become a three-piece with Paul Lawson taking on both guitar and vocal duties). Nick 'Filf' Robinson of the Sinyx was also briefly in the band, providing additional guitar. They recorded their first demo late in 1981, a track of which was picked up by Crass and brought the band wider attention on volume two of the Bullshit Detector series of compilation albums released by Crass Records. During the mid-1980s the band moved away from their original anarcho-punk roots, and began to incorporate influences from glam rock as well as acts such as Johnny Thunders. After a period of many line-up changes KU finally split up in 1986.
The band released two EPs, "The Unknown Revolution" (Spiderleg Records) and "Part of the Game" (Dogrock Records). A twenty three track retrospective CD, Insurrection, which includes most of the bands recordings including demo tapes, etc., was released in November 2000.