Colosseum are an English jazz rock band, mixing blues, rock and jazz-based improvisation. Colin Larkin wrote that "the commercial acceptance of jazz rock in the UK" was mainly due to the band. Between 1975 and 1978 a separate band Colosseum II existed playing progressive rock.

Jazz fusion is a popular music genre that developed in the late 1960s when musicians combined jazz harmony and improvisation with rock music, funk, and rhythm and blues. Electric guitars, amplifiers, and keyboards that were popular in rock and roll started to be used by jazz musicians, particularly those who had grown up listening to rock and roll.