Passage 7.13.6
στρατήγημα δὲ ἄλλο ἐς τοὺς Λακεδαιμονίους παρεῦρε τοιόνδε· τὰ ἐν κύκλῳ τῆς Σπάρτης πολίσματα ἐς τὴν Ἀχαιῶν ὑπηγάγετο εὔνοιαν, ἐσήγαγε δὲ ἐς αὐτὰ καὶ φρουράς, ὁρμητήρια ἐπὶ τὴν Σπάρτην Ἀχαιοῖς εἶναι.
He devised another stratagem against the Lacedaemonians as follows: he brought under the goodwill of the Achaeans the towns located around Sparta, and introduced garrisons into them, so that they might serve the Achaeans as bases for operations against Sparta.