Passage 7.8.1
τότε δὲ ἥκων ὁ Φλαμίνιος Ἐρέτριάν τε διήρπασε, τοὺς φρουροῦντας Μακεδόνων μάχῃ νικήσας, καὶ αὖθις ἐλάσας ἐπὶ Κόρινθον κατεχομένην ὑπὸ Φιλίππου φρουρᾷ αὐτός τε προσεκάθητο πολιορκῶν καὶ παρὰ Ἀχαιοὺς ἅμα ἀποστέλλων ἐπήγγελλέ σφισιν ἀφικνεῖσθαι πρὸς Κόρινθον στρατιᾷ, συμμάχους τε ἀξιωθησομένους καλεῖσθαι Ῥωμαίων καὶ ἅμα εὐνοίᾳ τῇ ἐς τὸ Ἑλληνικόν.
At that time, Flaminius arrived and sacked Eretria, having defeated in battle the Macedonian troops defending it. Then, advancing toward Corinth, which was occupied by a garrison of Philip, he personally laid siege to it and simultaneously sent envoys to the Achaeans, urging them to come with their forces to Corinth. He promised that they would be considered allies of the Romans and would share in Rome’s goodwill toward the Greek nation.