Christian metal emerged in the late 1970s as a means of evangelism to the wider heavy metal music scene, and was pioneered by American bands Resurrection Band and Petra and Sweden's Jerusalem. Los Angeles's Stryper achieved wide success in the 1980s. California's Tourniquet and Australia's Mortification led the movement in the 1990s. Rap metal group P.O.D. and the metalcore groups Underoath, Demon Hunter, As I Lay Dying, and Norma Jean (dubbed by "Revolver" magazine as "The Holy Alliance") brought some mainstream attention to the movement in the first decade of the 21st century, achieving ranks in the "Billboard" 200.