Sadus formed in 1984 in Antioch, California. The band started off playing a deathrash, a style in between thrash metal and death metal, and released their debut album Illusions, which was later re-released as Chemical Exposure, in 1988. The sophomore LP Swallowed in Black came out in 1990. With their albums A Vision of Misery and Elements of Anger their sound shifted towards technical thrash metal. Despite suffering from poor media exposure, this band has been able to reach the highest peaks in the genre