"[Vader is slaughtering the Separatist leaders] The war is over! Lord Sidious... promised us peace! We only want to— [Vader cuts him down, then deactivates his lightsaber]"
January 1, 1970
https://en.wikiquote.org/wiki/Star_Wars%3A_Episode_III_%E2%80%93_Revenge_of_the_Sith