πολέμαρχος πολέμ-αρχος, ὁ, one who begins or leads the war, a leader, chieftain, Aesch. a Polemarch, at Athens, the third archon, who presided in the court in which the causes of the μέτοικοι were tried, Ar.;—in earlier times he was general-in-chief, as at Marathon, Hdt. at Sparta, a kind of brigadier, Hdt., Thuc., etc. at Thebes officers of chief rank after the Boeotarchs, Xen. similarly at Mantineia, and in other states, Thuc.