From The Guardian:
Motivational music has been used by the military for centuries, but in modern wars, soldiers are bringing their own playlists.
It was a throwaway statistic in an article about the heavy metal band Slayer that got Jonathan Pieslak thinking. During the Gulf war, he read, some 40% of the band's fan mail came from soldiers stationed in the Middle East.
Professor Pieslak is a music theorist at the City College of New York. Over the past few years he has interviewed US soldiers about the music they listen to and – more importantly – what they listen to it for.
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My Comment: I prefer Guns N Roses