This is a cover version, the original of which is performed by Diamond Head, a largely obscure NWOBHM band that nonetheless had seminal influence on a number of metal acts – most notably Metallica, who would go on to cover several other Diamond Head tracks over the years.

This song draws on the classical music piece ‘Mars, Bringer of War’ by Gustac Holst.

https://www.youtube.com/watch?v=L0bcRCCg01I