5000 years ago, if you were up against the guy who had this, you would think it was a sword. They were rare and expensive -- you wouldn't have one.
Your weapon would be a sharp stick, maybe a short stick with a stone tied to the end of it. The guy with the sword would close on you and stab you in the belly. The wound would put you out of the fight right away, but would only be fatal after a couple of days.
A regular old club would trump that little thing. So would any staffed weapon.
Well stated! From the classical period Spartans, there's an anecdote about a Spartan warrior who was complaining to his mother that his sword was too short; in the inimitable way of the Spartan mother, she told him to take a step forward, and it would become long enough.