Composed by John Williams for Raiders of the Lost Ark in 1981, the Raiders March became the signature theme for Indiana Jones and returned in every sequel. Its instantly recognisable brass melody helped define the modern adventure film score and has since been quoted in trailers, parodies and television. Online, creators reuse the short fanfare to signal heroism, exploration or a grand entrance, keeping a four-decade-old film theme familiar to viewers who may never have seen the original movies.