Osbourne and Iommi settled a disbute over the trademark of the name Black Sabbath, though the details of the settlement were not disclosed.
Dio passed away from cancer at age 67.
Released the compilation Black Sabbath: The Dio Years.
Were inducted into the Rock and Roll Hall of Fame.
Reunited again after a hiatus to headline Ozzfest.
Osbourne began starring on the landmark candid reality show "The Osbournes."
Tony Iommi, Geezer Butler, Ozzy Osbourne, and Bill Ward reuinted for the live album Reunion, spawning the Grammy award winning single "Iron Man."
Band changed lineups again, replacing the departing Butler with Neil Murray on bass and Cozy Powell on drums for Forbidden.
Iommi and Butler brought back vocalst Tony Martin to replace the departing Dio, and recruited Rainbow drummer Bobby Rondinelli for Cross Purposes.
Iommi reunited with Butler and Dio for Dehumanizer.
Released the album Tyr, with themes loosely taken from Norse mythology.
Released the album The Eternal Idol with Tony Martin on vocals.
The original lineup reunited for a single night to play the Live Aid benefit concert.
Gillian left to rejoin Deep Purple and was replaced by David Donato. Shortly afterward, Butler quit the band.
Released the album Born Again.
Deep Purple's Ian Gillan joined to replace Dio. The two founding members, Tony Iommi and Geezer Butler, hoped to change the band's name at this time to reflect its new personage, but their label persuaded them otherwise.
Dio left the band to begin a solo project.
Released the album Mob Rules.
Toured with Blue Oyster Cult, ultimately performing a New York concert that was released as the concert film " Black and Blue."
Rainbow singer Ronnie James Dio joined the band as lead singer and Quartz's Geoff Nicholls joined on keyboards.
Osbourne was fired from the band for his reported drug and alcohol abuse.
Osbourne left the band for a short time, during which he was replaced on vocals by Dave Walker. He returned to the group later that same year, ultimately joining them to write and record Never Say Die.
Released the critical disappointment Technical Ecstasy.
Released the album Sabotage.
Performed for over 200,000 fans at the California Jam festival in Ontario, California.
Released the album Sabbath Bloody Sabbath, which included new elements such as synthesizers and strings, and featured Yes keyboardist Rick Wakeman on the song "Sabbra Cadabra."
Released their fourth album, Black Sabbath Vol. 4.
Released their third album, Master of Reality, which contained some of the band's first acoustic songs.
Released their self-titled debut album.
Released their sophomore album, Paranoid.
Performed "Black Sabbath", "N.I.B.", "Behind the Wall of Sleep", and "Sleeping Village" on John Peel's "Top Gear" radio show.
Signed with Philips Records.
Guitarist Tony Iommi and drummer Bill Ward brought bassist Geezer Butler and vocalist Ozzy Osbourne on board for a new band, following the dissoluton of their previous group, Mythology.
Popular songs include "Iron Man" and "War Pigs/Luke's Wall".
Known for such albums as "Paranoid" and "We Sold Our Soul For Rock 'N' Roll"
Geezer Butler and Ozzy Osbourne previously played together in the band Rare Breed, while Tony Iommi and Bill Ward played together previously in the band Mythology.
Group was initially named the Polka Tulk Blues Band and then Earth before settling on Black Sabbath.
Band originally included saxophonist Alan "Aker" Clarke and slide guitarist Jimmy Phillips, but when Iommi felt their dedication to the project was lacking, they disbanded and quietly reformed as a four-piece without them.
Iommi briefly left the band to join Jethro Tull in 1969, but returned later that same year.
Rented Clearwell Castle during the early-'70s and rehearsed together in the abode's dungeons.