Though his parents were from Cortland, New York, Dio was born in Portsmouth, New Hampshire, where his family resided for his father's service in the U.S. Army during World War II; they soon returned to Cortland. Dio's music career began there in 1957 as part of the Vegas Kings (later Ronnie and the Rumblers). In 1967, he formed the rock band Elf, which became a regular opening act for Deep Purple. In 1975, Deep Purple guitarist Ritchie Blackmore founded the band Rainbow and hired Dio to be his lead singer; during his tenure, the band released three studio albums. Dio quickly emerged as one of heavy rock's pre-eminent vocalists. In 1979, Dio replaced Ozzy Osbourne as Black Sabbath's lead singer and appeared on three studio albums with the band, all three of which met with success: "Heaven & Hell" (1980), "Mob Rules" (1981) and "Dehumanizer" (1992). In 1982, he left to form the band Dio, which itself had two albums certified platinum by the RIAA. In 2006, he founded the band Heaven & Hell with ex-bandmate Tony Iommi. In 2009, Dio was diagnosed with stomach cancer, and he died of the affliction the following year.