During the First World War, Scottish pipers walked into the trenches with their regiments as if the battlefield were a place that still answered to ancient customs. In battles like Delville Wood in 1916, men stepped out of the earthworks and into the shattered open ground with the wail of bagpipes behind them. Tunes like The Campbells Are Coming rose over the noise of rifles and shells. For some, the sound steadied the nerves. For others, it felt like a call to remember where they came from and