E.C. Marchant, Commentary on Thucydides: Book 3

πάσης—‘any,’ inclusive, a common use of πᾶς and its derivative adverbs.

ἡμετέρᾳ—objective; II. 42 τὴν τῶν ἐναντίων τιμωρίαν.

τὰ πρὸς ἡμᾶς—adverbial, ἵνα ἡμᾶς τιμωροῖσθε.

ὑπάρχον—sc. μὴ ξυνεπιέναι. γε gives a causal sense to a partic.

προβάλλεσθε—as a defence; cf. I. 37 τὸ εὐπρεπὲς ἄσπονδον προβέβληνται.

γε—not a common use of γε, where it serves to connect, and at the same time throws feeling into the sentence: ‘Ah, yes.’

παρέχειν—sc. ὐμῖν.

δέ γε or δὲ . . γε is used to cap a previous statement or, while accepting it, to bring in a consideration on the other side; it is common in retort (Neil).

κατα-προδοῦναι—‘utterly to betray’; so prob. in καταδουλουμένους.

τοῖς δέ=ἐκείνοις δέ.

καίτοι . . ἀποδιδομένας—‘surely failure to return favours with like favours (cf. ἴσην above) is dishonourable; and not failure to return debts of gratitude that were justly incurred (cf. ὐμεῖς . . ἀδικούμενοι) but of which the payment leads to injustice’ (cf. τοῖς δὲ ἀδικοῦσιν). You should have waited till they were ἀδικούμενοι to return the service they had rendered to you.