so there's this march in Das Boot, "Muess I Denn." I was listening to the soundtrack the other day and got curious so; it turns out to be a Swabian folk tune which *was* a "capstan song" in tall ship days, and which the Imperial Navy made a traditional quick-march. I'm not quite sure how you get from "move a capstan" to "quick march," but it seems very stereotypically German to make something faster tempo and thumpier.