Conversation so far:
What was the relation between Dimebag and Darrell?
Dimebag Darrell was an American musician and songwriter. He was the guitarist of the heavy metal bands Pantera and Damageplan.
When was the band Pantera formed?
Pantera was formed in 1981.

Question: What was the purpose of the band?
Self-contained rewrite: What was the purpose of the band Pantera?