1941 saw the first use of the nickname "Coke" as an official trademark for the product, with a series of advertisements informing consumers that "Coke means Coca-Cola".[131] In 1971, a song from a Coca-Cola commercial called "I'd Like to Teach the World to Sing", produced by Billy Davis, became a hit single. During the 1950s the term "cola wars" emerged, describing the on-going battle between Coca-Cola and Pepsi for supremacy in the soft drink industry. Coca-Cola and Pepsi were competing with new products, global expansion, US marketing initiatives and sport sponsorships.[132]