Kenpuu Denki Berserk - episode 1 - 07 Oct, 1997

A girl is being assaulted in a bar when Guts walks in. He kills all the assailants but one and orders him to tell his master, the Baron, that the Black Swordsman is coming. Guts later finds and kills the Baron, and removes a demonic relic called a Behelit from around his neck. Soon after, Guts remembers the events in his past of when he fought the knight Bazuso. (Source: Wikipedia)