The anime series Berserk is based on the manga of same name by Japanese artist and author Kentaro Miura. The show has 25 episodes without any fillers.
When Guts was beaten by Griffith, the Band of Hawk’s leader and a man who seemed to know everything about him; he became his best warrior. He quickly rises through its ranks reaching as high as second in command before finally becoming captain. Griffith introduced Guts to his Behelit, a demonic relic from beyond this world and reveals him his dream to rule a kingdom of his own. Three years later the Band of The Hawk are growing in power with more members than ever before to make this dream reality.