I.an alliance offensive and defensive (opp. to an ἐπιμαχία, defensive), Hdt., etc.: συμμαχίαν ποιεῖσθαι πρός τινα id=Hdt.; τινί Thuc.
2.generally, the duty of an ally, Aesch.
II.= τὸ συμμαχικόν, the body of allies, Hdt., Thuc.: also, the country of one's allies, Thuc.
2.an allied or auxiliary force, id=Thuc., Xen.