Trauma is an American heavy metal band formed in 1981. The band is best known for having bassist Cliff Burton in its initial lineup, who would later leave the band to join Metallica. It currently consists of members Brian Allen, Kris Gustofson, Steve Robello, Joe Fraulob, and Greg Christian. On September 28, 2020, vocalist Donny Hillier died from an undisclosed illness. He was replaced by vocalist Brian Allen almost a year later on August 24, 2021.