Star Wars Imperial March
The Imperial March is a musical theme recurring in the Star Wars movies. It was composed by John Williams.One of the best known examples of symphonic theme for a movie, it is a classical example of a pompous march. While played by an orchestra on the movie soundtrack, it is often played by brass bands. Military bands are particularly effective in delivering the theme's martial stance.
In the movies, the march is played when the Emperor or Darth Vader appear (although it was not yet created at the time of the first film) or their appearance is suggested.