Well, it's a sort of extra-high-kicking goose-step. Real armies have been known to do something rather like that. In fact, there are a couple of cases where they still do - for example, I recall a video of the changing of the guard at official crossing-points on the Indo-Pakistan border, in which there really is some marching in a pretty similar style to the Amnian legionnaries. (No, I don't know why they do it.)
Comments