Claude Debussy died on 25 March 1918 to the sound of explosions. Four days earlier, the Kaiser’s army had deployed its long-range Paris Gun, and as Debussy’s cancer entered its final hours, artillery shells were bursting in the streets around his home in Avenue du Bois-de-Boulogne. This quiet modernist — who’d transformed music into an art of almost limitless expressive subtlety — died amid the thunder of mechanised war.