§2.7.1γεγενημένου δὲ τοῦ ἐν Πλαταιαῖς ἔργου καὶ λελυμένων λαμπρῶς τῶν σπονδῶν οἱ Ἀθηναῖοι παρεσκευάζοντο ὡς πολεμήσοντες, παρεσκευάζοντο δὲ καὶ Λακεδαιμόνιοι καὶ οἱ ξύμμαχοι, πρεσβείας τε μέλλοντες πέμπειν παρὰ βασιλέα καὶ ἄλλοσε πρὸς τοὺς βαρβάρους, εἴ ποθέν τινα ὠφελίαν ἤλπιζον ἑκάτεροι προσλήψεσθαι, πόλεις τε ξυμμαχίδας ποιούμενοι ὅσαι ἦσαν ἐκτὸς τῆς ἑαυτῶν δυνάμεως.
Now that the affair at Plataea had taken place and the treaty had been glaringly broken, the Athenians began to make preparations for war, and the Lacedaemonians and their allies did the same, both intending to send embassies to the King and to other barbarian lands, in the hope of obtaining aid from any possible quarter, and attempting to win over as allies such cities as were outside their own sphere of influence.
§2.7.2καὶ Λακεδαιμονίοις μὲν πρὸς ταῖς αὐτοῦ ὑπαρχούσαις ἐξ Ἰταλίας καὶ Σικελίας τοῖς τἀκείνων ἑλομένοις ναῦς ἐπετάχθη ποιεῖσθαι κατὰ μέγεθος τῶν πόλεων, ὡς ἐς τὸν πάντα ἀριθμὸν πεντακοσίων νεῶν ἐσομένων, καὶ ἀργύριον ῥητὸν ἑτοιμάζειν, τά τε ἄλλα ἡσυχάζοντας καὶ Ἀθηναίους δεχομένους μιᾷ νηὶ ἕως ἂν ταῦτα παρασκευασθῇ.
For the Lacedaemonians, in addition to the ships already available at home, orders were given to those in Italy and Sicily who had chosen their side to build ships in proportion to the size of their cities, so that the total number should reach five hundred, and to get ready a specified sum of money, while keeping quiet in other respects and receiving the Athenians with only a single ship until these preparations should be completed.
§2.7.3Ἀθηναῖοι δὲ τήν τε ὑπάρχουσαν ξυμμαχίαν ἐξήταζον καὶ ἐς τὰ περὶ Πελοπόννησον μᾶλλον χωρία ἐπρεσβεύοντο, Κέρκυραν καὶ Κεφαλληνίαν καὶ Ἀκαρνᾶνας καὶ Ζάκυνθον, ὁρῶντες, εἰ σφίσι φίλια ταῦτ’ εἴη βεβαίως, πέριξ τὴν Πελοπόννησον καταπολεμήσοντες.
The Athenians, on their part, scrutinized their existing alliance and sent embassies especially to the places around the Peloponnese, namely Corcyra, Cephallenia, the Acarnanians, and Zacynthus, seeing that if these were firmly friendly to them, they would be able to carry on the war by surrounding the Peloponnese.