A.alliance, offensive and defensive (opp. an ἐπιμαχία or defensive one, Th.1.44), IG12.52.16, al., Hdt.2.181, 4.120, etc.; “ς. ποιέεσθαι πρός τινα” Id.5.73, cf. 63, X.HG3.2.21, IG22.43.26, etc.; τινι Th.1.44,57; ἡ ἔξω ξ. Id.3.65; “ς. παρέχεσθαι” Pl.R.474b.
2. generally, the duty of an ally, “ξυμμαχίας ἁμαρτών” A.Ag.213 (lyr.) (which others take in signf. 11).
II. = τὸ συμμαχικόν, the body of allies, Hdt.1.77,82, E.Rh.994 (anap.), Th.1.118,119, etc.; “συμμαχίας συνελθούσης” Aeschin.2.32.
2. allied or auxiliary force, Th.6.73; “ς. πέμπειν” X.HG4.8.24, cf. SIG 763.5 (Cyzicus, i B.C.); ἔξωθεν ἐπάγεσθαι ς. Pl.R.556e: generally, body of friends, Pi.O.10(11).72.