Pigs of the Roman Empire featured the guitarist from an American rock band from Los Angeles, California, formed in what year?
Pigs of the Roman Empire: Pigs of the Roman Empire is an album by the American alternative metal group Melvins and electronic musician Lustmord, which was released in 2004 through Ipecac Recordings. Pigs of the Roman Empire:  Adam Jones, guitarist for Tool, also makes substantial contributions to the album. Tool (band): Tool is an American rock band from Los Angeles, California. Tool (band):  Formed in 1990, the group's line-up includes drummer Danny Carey, guitarist Adam Jones, and vocalist Maynard James Keenan.
1990