The Elastic Oz Band was a short-lived British rock group formed in 1971 for a specific cause: to raise awareness and funds for the Oz magazine, a counterculture periodical prosecuted for obscenity in the UK. The band was notable for its unique lineup, which included John Lennon and Yoko Ono, and its single "God Save Us/Do the Oz," which Lennon and Ono wrote and produced. The band's existence and the single it produced played a significant role in the history of activism in music, showcasing how popular artists could rally around a cause. The Elastic Oz Band stands as an example of the intertwining of music and social activism in the 1970s.