The "Imperial March" is a musical piece composed by John Williams for the Star Wars franchise. It serves as the theme for the Galactic Empire and is often associated with the character Darth Vader. The march is characterized by its ominous and driving rhythm, featuring bold brass and percussion sections, and has become one of the most recognizable pieces of music associated with the franchise. It is played during scenes depicting the evil empire, often when Darth Vader or the imperial army is on screen. The "Imperial March" has been widely celebrated as one of the greatest pieces of film music ever composed and remains an iconic part of the Star Wars franchise.