Exordium was formed in 1996 by Toni Kemppainen and Tuukka Karstila, Kemppainen as a vocalist/guitarist and Tuukka Karstila as a guitarist. Later Mikko Salopino became to be the bass player and second vocalist. Atte Karstila started as a session drummer but soon he became a permanent member. In 1998 Exordium recorded few rehearsal demos. In 1999 paths separated between Exordium and Salopino. 2001 "Exordium" 10" was released through Northern Heritage. 2003 Santtu Tiihonen did session vocals on "Crushing the Holy Trinity" recordings and later become permanent vocalist/bassist. 2004 "Exordium" mCD was released and first live performance was made. 2005 Crushing the Holy Trinity 3LP/3CD compilation was released featuring Deathspell Omega, Stabat Matter, Clandestine Blaze, Mustasurma, MGLA and Exordium. Later that year "Nihil I.N.R.I." 7" was released. Few live performances was made. 2007 "Mass of Bestial Blasphemy" liveMC was released. 2008 Northern Heritage released debut full lenght "In Wrath Principle". 2009 live performances was made in Blackmass Ritual Fest II and Black Curse Over Hellsinki. Grimly remastered LP "In Wrath Principle" was released.