The music of war was often psychological warfare. Some of the battles in india that I have read about describe the drums as so loud you cannot hear someone speaking next to you. They communicated in sign. It could be quite intimidating and during a siege it could stop you from sleeping.
They need the right context. I am unsure if it’s a sampled bagpipe, actual bagpipe or something that sounds like a bagpipe, but it sounds fucking awesome here.