Toadfrog, the Double Headed Eagle was the symbol of the Holy Roman Empire of the German Nation (I. Reich). After it was dissolved, it was preserved in the Austrian Empire (the first emperor of which was also the last emperor of the I. Reich.)
The II. Reich under the Prussan kings flew the Prussian eagle (one headed, black on white) with an additional shield.
Afterwards (before and after the III. Reich) the Republic returned to the old German eagle (black, red fangs, on gold)which was used for the first centuries of the I. Reich. Interesting that the President of the German Federal Republic flies a pennant which is the same as that of the old German kings (and Roman emperors), with a red border, as it is preserved in King Henry's VI. coat of arms in an old collection of medieval singers.

Walrus, the slow step was abandoned in Germany in the last century; it is only remembered in some old soldier songs.
If the marches are played to the slow step (65 steps p/m at the beginning of the 19th century), the marches are played alla breve. A survival of this usage is preserved in the march "Present arms", when our Guard Bataillon presents arms and the Chancellor with his ceremonial guest is walking along the front in a slow step (sometimes on TV) and the band is tooting fast.
In addition to the slow step not only the Germans, but other armies, too, had the quick step for attacks or forced marches.

Wilfried