Sword of the Free

The Sword of the Free was a sword which originally belonged to Julius Caesar.

In around 47 BCE, Caesar wielded the sword in the Cyrene Gladiator Arena and defeated Polymestor, a gladiator under the employment of a Roman lanista. Despite given the choice to execute the gladiator, Caesar chose to spare him, giving him the sword and with it, his freedom.

Refusing to fight in arenas any longer, Polymestor left the lanista's services, taking the sword with him. Polymestor eventually threw the sword away in the Mediterranean Sea, beliveving it to be bad luck. The Medjay Bayek later retrieved the sword in the sea, having being sent by the lanista to recover the sword.

Reference

 * Assassin's Creed: Origins