Exactly what it says on the tin. Would a general, prolonged European War anywhere in the latter half of the nineteenth century-- between 1870 and 1904, give or take-- see the introduction and mass production of metal helmets? If, for instance, France went to war with Germany again in 1887 and dragged half of Europe into the mess, is it likely that the kepi would've been discarded in favor of something with a bit more armor?
Or is this period too early for the (re-)introduction of helmets? Why?
Or is this period too early for the (re-)introduction of helmets? Why?