Complex sentence: He led an army of werewolves into a war many years ago when a clan of evil vampires attempted to rule the world; the werewolves took the victory and the Wolfsberg country became sacred land where the Wolfsberg Manor now stands.
Split into simpler sentences: He led an army of werewolves into a war many years ago when a clan of evil vampires attempted to rule the world. The war turned to the werewolves' favor and the Wolfsberg country became sacred land where the Wolfsberg Manor now stands.