Conversation so far:
How did the band Testament increase their popularity?
Testament released their second album, The New Order, in May 1988 and the band also made a number of festival appearances in the summer of 1988.
When did the band Testament release their second album, The New Order, and make a number of festival appearances?
Testament released their second album, The New Order, in May 1988 and the band also made a number of festival appearances in the summer of 1988.

Question: What happened in 1989?
Self-contained rewrite: What happened to the band Testament in 1989?