Military helmets disappeared and later reappeared in European armies between 1600 and 1900
the verdict
SUPPORTED
the evidence backs this
confidence 75/100
Historical records confirm that military helmets largely disappeared from general use in European armies following the advancement of firearms around the 17th and 18th centuries, only to reappear as modern steel helmets during World War I in the 20th century.
Evidence for · 4
history.stackexchange.com: Disappearance and reappearance of helmets in European ...
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Discusses disappearance of helmets in 17th-19th centuries and return in early 20th century.
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en.wikipedia.org: Combat helmet
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Notes armor became obsolete due to firearms, but helmets reappeared in late 19th/early 20th century.
history.stackexchange.com: Did soldiers wear helmets in the 19th century?
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States helmet use declined after 1670/1700 and steel helmets were renewed during WWI.
history.stackexchange.com: Why were helmets and other body armour not commonplace in the 1800s?
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Notes steel helmets were replaced with caps/shakos in the 1800s before WWI resurgence.