ἔξω τῶν τειχῶν—i.e. north-west of the κύκλος. With προάγειν ἔξω cf. ἐκπλεῖν, ἐκστρατεύεσθαι ἔξω.
μᾶλλον ἢ πρότερον—and not as previously. Before, they had fought μεταξὺ τῶν τειχισμάτων. (This use of μᾶλλον is a common meiosis, Cf. II. 41.2 οὐ κόμπος μᾶλλον ἢ ἔργων ἀλήθεια.)
προαγαγὼν—as to the exact scene and formation of the battle edd. are unable to agree. The question is of no importance
ἐκ πλαγίου—so as to take the A. left in flank. Contrast κατὰ πρόσωπον I. 106.