Following his 1970 departure from the Guess Who, guitarist Randy Bachman recorded a solo album (Axe) and planned a project with ex-Nice keyboardist Keith Emerson (later canceled due to illness) before forming Bachman-Turner Overdrive in 1972. Originally called "Brave Belt," the metal group was comprised of singer/guitarist Bachman, fellow Guess Who alum Chad Allan, bassist C.F. "Fred" Turner, and Randy's brother, drummer Robbie; after a pair of LPs (Brave Belt I and Brave Belt II), Allan was replaced by another Bachman brother, guitarist Tim, and in homage to the trucker's magazine Overdrive, the unit became BTO.
While their self-titled 1973 debut caused little impact in the U.S. or the band's native Canada, Bachman-Turner Overdrive II was a smash, netting a hit single with the anthemic "Takin' Care of Business." Prior to the release of 1974's Not Fragile, Tim Bachman exited the group to begin a career in production, and was replaced by Blair Thornton; the album was a chart-topping success, and notched a number one single with "You Ain't Seen Nothin' Yet."