This is a photo taken in 2015 by Wikimedia Commons user Jebulon, of a helmet made for a Mycenaean warrior between 3.300 and 3,400 years ago. It’s a display at the National Archaeological Museum of Greece, but at the dawn of history, Homer described a helmet just like this in Book 10 of The Iliad, which Odysseus pulls onto his crafty head before a raid on the Trojans: “On the inside there was a strong lining on interwoven straps, onto which a felt cap had been sewn in. The outside was cleverly adorned all around with rows of white tusks from a shiny-toothed boar, the tusks running in alternate directions in each row.”
According to Wikipedia, this would be a valuable piece of military hardware — Homer refers to it as an heirloom, and to get this many tusks, you’d have to kill 40 to 50 boars, no easy feat in the days of javelins and spears. Of course, once you’d put this on your head, it would be no easy feat to kill you….