Disillusion was founded in 1994 by Andy Schmidt, Tobias Spier, Alex Motz, Markus Espenhain and Jan Stölzel.

Despite the departure of bassist Markus Espenhain in early 1996, the first demo Subspace Insanity was recorded in March the same year.

Disillusion signed a contract with Metal Blade Records and released the first album Back to Times of Splendor in 2004.

"[2] After the release Disillusion performed at several festivals (including Summer Breeze Open Air) and a European tour as support for Amon Amarth and Impious.

With the album, Disillusion entered new musical territory and relied heavily on distorted vocals as well as more electronic sounding elements.

[8] In April 2016, Ben Haugg was officially introduced as a new bass player, as Djon had to return to France due to private obligations.

To aide with the writing process, Andy Schmidt isolated himself to a small cabin in the woods somewhere in the Czech Republic for 3 weeks to work undisturbed on new songs.

This time, bass player, Ben Haugg, would be moving on to third guitar and the band announced two new members.

After performances in the summer of 2022 at festivals such as Graspop Metal Meeting and Dong Open Air, the band announced in early August that the fourth album will be called AYAM and will be released worldwide on November 4 of the same year.

This was followed by a joint European tour in September with Obscura (band) and Persefone, which brought Disillusion to countries such as Italy and the UK for the first time.

After the release of the second single Tormento, the band released the album AYAM at the beginning of November, which was highly praised by fans and the press alike and reached number 35 in the German album charts, marking the highest chart entry in the band's history.