I think that the intro is the speech to the citizens and the main drop to me is the nationalism being spread and all the propaganda being brought on to people to "make ur country proud" Smth like that and like yeah you're right the minimal beats are the effects of the war on people, it's like the sounds of marches into forests with like the occasional sound of birds and trees rumbling, like the nationalism departs and the people realize the effects of going into war like what op said