iirc The Roman soldiers aimed for just below the sternum with their Gladius, apparently the shock of it going in was enough to kill. (Something to do with a knot of nerves in that area)
The one you found looks like a butt plug now that the blade has rusted away

, but when it was new it could probably also stove someone's head in through their hat if there wasn't an opporchancity to use the point.

It's brutal either way, an example is in Ensign Ewart of the Scots Greys account of how he captured a French Eagle at Waterloo:
"One made a thrust at my groin, I parried him off and cut him down through the head. A lancer came at me - I threw the lance off by my right side and cut him through the chin and upwards through the teeth. Next, a foot soldier fired at me and then charged me with his bayonet, which I also had the good luck to parry, and then I cut him down through the head".Different blade but that's some nasty shit right there, it probably wasn't even a mortal wound to teeth bloke....unless you count the chances of a resulting infection and lingering painful death.
(Speaking of lingering death through infection, another French bloke didn't fare too well against another Scot. King Henry II of France had a splinter of a lance pierce his eyes during a tournament against a Scots Knight and it took him 11 days to die (septicaemia), apparently in agony.

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