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It seems to me that many countries based their military after that of the French before the Franco-Prussian war, since I believe it was the premiere military force at the time, by using Napoleonic tactics and wearing French style uniforms such as the kepi hat. But after Prussian defeated it and unified Germany after the FPW I've noticed things like Britain adapting pith helmets styled after German pickelhaubes. Was the adaption of this helmet design a cause of Britain emulating Germany and if so what other affects did Germany have on the militaries of countries around the earth.
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