Passage 8.8.9
τοῦτο οὐκ Ἀγησίπολις τὸ στρατήγημα ἐς τὸ τεῖχος τῶν Μαντινέων ἐστὶν ὁ συνείς, ἀλλὰ πρότερον ἔτι Κίμωνι ἐξευρέθη τῷ Μιλτιάδου Βόγην πολιορκοῦντι ἄνδρα Μῆδον καὶ ὅσοι Περσῶν Ἠιόνα τὴν ἐπὶ Στρυμόνι εἶχον· Ἀγησίπολις δὲ καθεστηκὸς καὶ ᾀδόμενον ὑπὸ Ἑλλήνων ἐμιμήσατο. ὡς δὲ εἷλε τὴν Μαντίνειαν, ὀλίγον μέν τι κατέλιπεν οἰκεῖσθαι, τὸ πλεῖστον δὲ ἐς ἔδαφος καταβαλὼν αὐτῆς κατὰ κώμας τοὺς ἀνθρώπους διῴκισε.
This stratagem for capturing the wall of Mantineia was not devised by Agesipolis; rather, it had earlier been discovered by Cimon, son of Miltiades, when he besieged Boges, a Mede, and the Persian forces occupying Eion on the Strymon. Agesipolis merely imitated a tactic already established and celebrated among the Greeks. After he had taken Mantineia, he allowed only a small portion of the city to remain inhabited; the greater part he razed entirely to the ground and dispersed the inhabitants, settling them in separate villages.