Wikipedia
A Carthaginian peace is the imposition of a very brutal 'peace' by completely crushing the enemy. The term derives from the peace imposed on Carthage by Rome. After the Second Punic War, Carthage lost all its colonies, was forced to demilitarize and pay a constant tribute to Rome and could enter war only with Rome's permission. At the end of the Third Punic War, the Romans systematically burned Carthage to the ground and enslaved its population.
Usage examples of "carthaginian peace".
On tidings being received that the Carthaginian peace deputation had been seen at Puteoli and would come on from there by land it was decided to recall Laelius in order that he might be present at the interview.
Without the League, there would be another war with Germany within thirty years because of the Carthaginian peace being imposed by the Allies, who not only had broken the terms of the Wilsonian armistice but now meant to bankrupt Germany with reparations.