The effectiveness of its artillery arm was one of the dominating features of the German army on the battlefields of the Western Front in World War I. The expertise and technology that had made it so effective in that conflict werer never lost, so the ground was already laid for the rapid expansion of artillery of all types for the new Wehrmacht.

This film deals with the decline of the Luftwaffe bombing arm as Germany suffers heavy losses in Russia and the U.K. with its once dreadded night-bombing raids becoming increasingly ineffectual.

Drawing on archive film of Black Sabbath in performance and first hand accounts from band members Glenn Hughes and Geezer Butler we strip away the veneer to see what made the band what they were.