This song was not arranged for NES version.
The Promotion fanfare is played when you successfully complete a battle and are awarded a new rank. The track was composed in AdLib Visual Composer and converted from its native ROL format. The original file is named "DSTune3.mus". Sometimes this track messes up during the game's playback and has a single note played through the right channel when it first begins.
It has not been verified if and where Promotion plays in Commodore 64 version, but most probably, it again plays when you successfully complete a battle and are awarded a new rank.
The Amiga version of promotion is played at the same place as the DOS one.
The song plays as one of two mission clear themes. It was arranged by either Yoshio Kobayashi or Yasuhiro Kawasaki, written in Music Macro Language using a driver by an unknown programmer, but possibly Kobayashi himself.
Its internal filename is WIN1.OPM.