[2] Formed in the spring of 2004 by vocalist Chris Defaut, bassist Kevin Gibbons (Strychnine), and guitarist Brian Magley, the group recorded and released their first demo entitled "Oracle of Armageddon" in Fall of 2004.
In late 2005 Chris Defaut left the band to join Divine Empire,[6] and was replaced by vocalist Brian Werner (Vital Remains/Monstrosity), and guitarist Sam Molina (Monstrosity).
In 2007, Infernaeon released their debut album A Symphony of Suffering via Prosthetic Records and features Nick Augusto on drums (Trivium/Maruta) and guest vocals by Ben Falgoust (Goatwhore/Soilent Green).
In 2010, they released their second album Genesis to Nemesis also via Prosthetic Records[1] introducing new guitarists Steven Harger and Taylor Nordberg, new drummer Jeramie Kling (The Absence), and keyboardist Dave Stein (Northwinds/Strychnine).
[10] In 2013, the band started work on their follow-up to Genesis to Nemesis, entitled The Cancer Within, and newcomer Eric Rhodes replaced Werner on vocals.