In Pangs, Spike tells the Scoobies:
“You won. All right? You came in and you killed them and you took their land. That’s what conquering nations do. It’s what Caesar did and he’s not going around saying, “I came, I conquered, I felt really bad about it.”
Spike is referring to the Roman military and political leader Gaius Julius Caesar (c.100 BC-44 BC). The words “Veni Vidi Vici” (”I came, I saw, I conquered”) are often attributed to him.
Caesar is also referenced in Fear, Itself, when Willow says, “Okay, Brutus” (off Oz’s confused look) “Brutus? Caesar?… Betrayal? Trusted friend? Back-stabby?” In his play Julius Caesar, Shakespeare wrote Caesar’s final words as “Et tu, Brute?” after he was stabbed to death by a group of senators including his trusted friend Marcus Brutus.