Black Sabbath released their debut album Black Sabbath in the US. The album had already been released in Britain on February 13, 1970, and laid the foundations for heavy metal.
Black Sabbath released the title track from their second studio album "Paranoid" as a single. The song reached No. 1 in Denmark and West Germany, No. 4 in the UK, and No. 61 in the US.
Black Sabbath performed at the International Amphitheatre in Chicago during the tour supporting the album “Heaven and Hell”. The band featured Ronnie James Dio on vocals, with Blue Öyster Cult among the supporting acts.