The piece comes from Star Wars: Episode III – Revenge of the Sith (2005), composed by John Williams for the Order 66 sequence and the assault led by Darth Vader. Williams reused the militaristic style he had established for the Imperial March, inverted here into a funereal procession. Clips of the march spread on soundboards and in edits during the prequel revival of the late 2010s, when Revenge of the Sith scenes became a staple of memes. It remains popular because few cues signal a turn to evil so immediately.