A little known fact about Goose stepping:
The troops only Goosed stepped in front of the reviewing Area. Since goose stepping is hard{try doing it in Hobnails and Jackboots} They did it only when it was in front of VIPs. The rest of the time, they marched normally.
I have tried Goose stepping{Long story}. You cant do it for very long. But boy, does it look and sound impressive.
If I hear you correctly...goose stepping is all about projecting a martial image. It is saying..."we are going to war..."