Cato began to urge that the only sure defense against a resurgent Carthage was to destroy it. Rome would never be safe so long as Carthage stood. He made a campaign of it: Carthago delenda est! — Carthage must be destroyed! In the 150s this was Cato’s slogan, repeated endlessly. At parties he would bring it up — Carthago delenda est! In the Senate he might be speaking on any subject, but always found a way to work in his slogan: the harbor at Ostia should be expanded . . . and Carthage must be destroyed! the appointment of Gaius Gaius to provincial governor should be approved . . . and Carthage must be destroyed! A vote of thanks to a loyal tribal chieftain . . . and Carthage must be destroyed!