Conversation so far:
what was the band Slipknot's image?
Slipknot is known for its attention-grabbing image; the members perform wearing unique, individual face masks.
what other things played a part in Slipknot's image besides wearing unique individual face masks?
Slipknot members also perform wearing matching uniforms—typically jumpsuits.
What else was Slipknot known for besides unique face masks and matching uniforms?
Slipknot was also known for their aggressive style of music, and energetic and chaotic live shows.
Was the band slipknot successful?
In early 2000, Slipknot was certified platinum
How did the band slipknot respond to the  accusation that they stole their image from the band mushroomhead?
the band slipknot stated that the similarities were coincidental.
Have the band slipknot  won any awards?
the band Slipknot won the Grammy Award for best metal performance for the song Before I Forget“
What else is noted about the band slipknot?
Slipknot rapidly rose to fame following the release of their eponymous debut album in 1999.

Question: When did the band start
Self-contained rewrite: When did the band Slipknot start?