εἰς τὴν ἀγορὰν χειροτονεῖτε τοὺς ταξιάρχους καὶ τοὺς φυλάρχους, οὐκ ἐπὶ τὸν πόλεμον → you elect taxiarchs and phylarchs for the marketplace not for war
a good marksman: use adj., P. and V. εὔστοχος (Plato).