Testament

Testament is an American thrash metal band from California. Being one of the more influential American metal bands, they were perhaps the most popular band of that scene to not break into the mainstream. Some of their records nonetheless entered the charts in major markets such as the United Kingdom and Germany. Testament has two Top 40 albums and one Top 50 album to its credit in the UK. Their 1999 album The Gathering also entered the Top 50 in Germany. They had minor top 100 album success in the United States.   Wikipedia