Hidden Meaning Of A Coin - Prussian Militarism?

This is only my straightforward instinct to feel "Prussian militarism" from the design of these coins.

Frederick the Great (r. 1740-86)allowed this aggressive design - an eagle (Germany) stood over the victory flags and spears on his talers. Later, the design changed to an eagle standing over a big gun, does this imply the military progress in his country?

Frederick the Great's nephrew Friderick William II (r.1786-97) kept a similar design but I have no his coins shown here.

Then, Frederick William III (r.1797-1840) also allowed a similar design - an eagle standing over a big gun until 1822. At this time, the Holy Roman Empire had been collapsed and the real enemy Napoleon I had also been exiled. A peaceful German dominion enabled the reign to revert to a more general coin design - national emblems.

Do you have the same feeling with me? How do you account for these aggressive icons on the talers?

Henry